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	<title>BUSHMASTER &#8211; Small Arms Review</title>
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	<item>
		<title>Bushmaster Turns 50, Releases Anniversary Edition XM15A2 AR Rifle</title>
		<link>https://smallarmsreview.com/bushmaster-turns-50-releases-anniversary-edition-xm15a2-ar-rifle/</link>
		
		<dc:creator><![CDATA[SAR Staff]]></dc:creator>
		<pubDate>Mon, 30 Oct 2023 23:08:23 +0000</pubDate>
				<category><![CDATA[New Products]]></category>
		<category><![CDATA[Anniversary]]></category>
		<category><![CDATA[AR15]]></category>
		<category><![CDATA[BUSHMASTER]]></category>
		<category><![CDATA[XM15]]></category>
		<guid isPermaLink="false">https://smallarmsreview.com/?p=45817</guid>

					<description><![CDATA[Bushmaster Firearms is a venerable brand with a history of building proven and 100% American-made firearms. Keeping with that tradition, Bushmaster is excited to introduce the all-new, American-made XM15A2 50th Anniversary rifle, available in two collectible variations. The XM15A2 was designed as a throwback to the simple Bushmaster rifles they have always been known for. [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p>Bushmaster<strong> </strong>Firearms is a venerable brand with a history of building proven and 100% American-made firearms. Keeping with that tradition, Bushmaste<strong>r</strong> is excited to introduce the all-new, American-made <a href="https://www.bushmaster.com/shop/xm15a2/xm15a2-50th-anniversary-20-fixed-carry-handle-gold-edition/" data-type="link" data-id="https://www.bushmaster.com/shop/xm15a2/xm15a2-50th-anniversary-20-fixed-carry-handle-gold-edition/" target="_blank" rel="noopener">XM15A2 50th Anniversary rifle</a>, available in two collectible variations.</p>



<p>The XM15A2 was designed as a throwback to the simple Bushmaster<strong> </strong>rifles they have always been known for. Bringing classic elements from the history of Bushmaster<strong> </strong>rifles, the XM15A2 includes an A2 fixed carry handle, a 20-inch phosphate chrome lined barrel, a chrome lined bolt carrier and gas key, a rifle length gas system, an A2 style handguard, and a built-in rear 8/3 fixed carry handle sights.</p>



<p>This rifle will remind you of a time when things were simple, back when the standard was iron sights and carry handles. Bushmaster<strong> </strong>brought back phosphate finished, chrome lined barrels, and bolt carriers to rival the durability of the Windham, Maine originals.</p>



<p>The XM152A2 receivers are manufactured from 7075-T6 aluminum and are type III hard coat anodized. The XM152A is complete with classic A2 pistol grip, a Mil-Spec trigger, an A2 flash hider and includes three BFI aluminum 30-round magazines (10-round, California compliant magazines in CA version). All 100 of these collectible rifles are packaged in a limited-edition-logo embossed Pelican hard case, and include one limited-edition challenge coin marked with the 50th anniversary logo and our original 1973 logo on the back.</p>



<p>The XM15A2 is available in two configurations, <a href="https://www.bushmaster.com/shop/xm15a2/xm15a2-50th-anniversary-20-fixed-carry-handle-gold-edition/" data-type="link" data-id="https://www.bushmaster.com/shop/xm15a2/xm15a2-50th-anniversary-20-fixed-carry-handle-gold-edition/" target="_blank" rel="noopener">XM15A2 Gold ($1,636.95 MSRP) and XM15A2-CA ($1,649.95 MSRP)</a>.</p>
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		<item>
		<title>Bushmaster Progeny and AR-Maker Windham Weaponry Ceases Operations</title>
		<link>https://smallarmsreview.com/ar-maker-windham-weaponry-to-close-after-12-years/</link>
		
		<dc:creator><![CDATA[SAR Staff]]></dc:creator>
		<pubDate>Tue, 12 Sep 2023 18:39:02 +0000</pubDate>
				<category><![CDATA[Industry News]]></category>
		<category><![CDATA[AR]]></category>
		<category><![CDATA[BUSHMASTER]]></category>
		<category><![CDATA[Closures]]></category>
		<category><![CDATA[Maine]]></category>
		<category><![CDATA[Remington]]></category>
		<category><![CDATA[Windham Weaponry]]></category>
		<guid isPermaLink="false">https://smallarmsreview.com/?p=45020</guid>

					<description><![CDATA[As posted on it&#8217;s website, Windham Weaponry will stop taking orders tonight as it prepares to imminently cease operations. The company began operations 12 years ago when it was formed from what remained of Bushmaster&#8217;s headquarters in Maine. Then-parent company Remington moved Bushmaster from Maine to it&#8217;s New York location, leaving a good chunk of [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p>As posted on it&#8217;s <a href="https://www.windhamweaponry.com/" data-type="link" data-id="https://www.windhamweaponry.com/" target="_blank" rel="noopener">website, Windham Weaponry</a> will stop taking orders tonight as it prepares to imminently cease operations. The company began operations 12 years ago when it was formed from what remained of Bushmaster&#8217;s headquarters in Maine. Then-parent company Remington moved Bushmaster from Maine to it&#8217;s New York location, leaving a good chunk of talent and resources to start Windham Weaponry in its stead.</p>



<p>Here is Windham Weaponry&#8217;s statement as seen September 12, 2023:</p>



<blockquote class="wp-block-quote is-layout-flow wp-block-quote-is-layout-flow">
<p>It is with deep regret that we announce the closing of Windham Weaponry. Our website/online retail ordering system will remain active through Tuesday night, Sept 12. We will do our best to ship all orders this week and early next week. No credit card will be charged until the order is shipped.</p>



<p>Twelve years ago, when we started Windham Weaponry, our shareholders and longtime employees were excited to continue the traditions and spirit of Bushmaster Firearms, after the new owners decided to leave Maine.</p>



<p>We built WW into a company we could be proud of providing outstanding customer service, high quality products, as well as a great place for our dedicated employees to work.</p>



<p>The last few years have been a very challenging time for the firearms industry, and we have struggled to keep the WW dream alive for as long as possible. Unfortunately, we have not been able to meet our loan obligations with the bank after they worked with us as much as they could.</p>



<p>There was a glimmer of hope when we were negotiating with an investor to help keep WW alive and healthy, but that just fell through.</p>



<p>We have begun discussions with Keenan Auction Company to determine the best course of action for a full liquidation which should happen within the next month or so.</p>



<p>Our shareholders and employees truly appreciate your loyal support all of these years.</p>
</blockquote>
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		<item>
		<title>BIRTH OF A BLACK RIFLE FROM BARSTOCK TO BUSHMASTER</title>
		<link>https://smallarmsreview.com/birth-of-a-black-rifle-from-barstock-to-bushmaster/</link>
		
		<dc:creator><![CDATA[SAR Staff]]></dc:creator>
		<pubDate>Sun, 01 Jan 2006 00:52:52 +0000</pubDate>
				<category><![CDATA[Articles]]></category>
		<category><![CDATA[Articles by Issue]]></category>
		<category><![CDATA[Search by Issue]]></category>
		<category><![CDATA[V9N4 (Jan 2006)]]></category>
		<category><![CDATA[Volume 9]]></category>
		<category><![CDATA[2006]]></category>
		<category><![CDATA[AR-15]]></category>
		<category><![CDATA[Black Rifle]]></category>
		<category><![CDATA[BUSHMASTER]]></category>
		<category><![CDATA[Industry Profile]]></category>
		<category><![CDATA[Jeff W. Zimba]]></category>
		<category><![CDATA[M-16]]></category>
		<category><![CDATA[V9N4]]></category>
		<guid isPermaLink="false">https://dev.smallarmsreview.com/?p=4103</guid>

					<description><![CDATA[Text &#38; Photos by Jeff W. Zimba SAR Exclusive Industry Profile For the first time in history, Bushmaster Firearms of Windham, Maine has allowed outside photographic equipment into their facilities. Small Arms Review was invited to visit Bushmaster Firearms to chronicle portions of the manufacturing process of their famous version of the Black Rifle. In [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p><em>Text &amp; Photos by <strong>Jeff W. Zimba</strong></em></p>



<p class="has-text-align-center"><strong><em>SAR Exclusive Industry Profile</em></strong></p>



<p class="has-text-align-center"><em>For the first time in history, Bushmaster Firearms of Windham, Maine has allowed outside photographic equipment into their facilities. Small Arms Review was invited to visit Bushmaster Firearms to chronicle portions of the manufacturing process of their famous version of the Black Rifle.</em></p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img fetchpriority="high" decoding="async" width="700" height="341" src="https://smallarmsreview.com/wp-content/uploads/2020/08/001-81.jpg" alt="" class="wp-image-9380" srcset="https://smallarmsreview.com/wp-content/uploads/2020/08/001-81.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/08/001-81-300x146.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/08/001-81-600x292.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>The sign that hangs in the work area in the Quality Control building.</em></figcaption></figure></div>



<p>In some parts of the world the word &#8220;Bushmaster&#8221; will conjure up images of large, venomous snakes. A member of the pit viper family, it is known for its lethality and is found in Central and South America. In circles of firearms enthusiasts and for members of the military and law enforcement, the same word is synonymous with quality AR-15 and M16 type rifles that are manufactured in the northern most state in New England.</p>



<p><strong>Company History</strong></p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img decoding="async" width="700" height="517" src="https://smallarmsreview.com/wp-content/uploads/2020/08/002-90.jpg" alt="" class="wp-image-9381" srcset="https://smallarmsreview.com/wp-content/uploads/2020/08/002-90.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/08/002-90-300x222.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/08/002-90-600x443.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Sights are checked for uniformity and “adjusted.”</em></figcaption></figure></div>



<p>Originally incorporated in 1973, Bushmaster Firearms concentrated their manufacturing efforts on the Bushmaster Arm Pistol, a survival gun designed for pilots during the Vietnam War. The Arm Pistol, along with a companion rifle known as the Bushmaster Assault Rifle utilized some parts from the M16 rifle family while employing an op-rod system similar to that used by the Soviet AK-47.</p>



<p>Following a company reorganization in 1980, Bushmaster Firearms, Inc. started to focus their efforts in selling AR-15 and M16 parts and eventually began to manufacture their own line of AR-15 and M16 replacement parts for sale. In 1983, the first complete rifles bearing the Bushmaster name were manufactured in Portland, Maine. Five years later the company relocated to their current location in Windham, Maine. Bushmaster Firearms, Inc. now owns a 52,000 square foot facility at their 19 acre business park and employs over 80 people at this location.</p>



<p>In 2002, Bushmaster established their Western Division in Lake Havasu City, Arizona. This division of Bushmaster Firearms, Inc. is dedicated to manufacturing a Carbon Fiber series of the AR-15 and M16 type firearms. This Western division now has over 25 full time employees and occupies 12,000 square feet to house their state of the art injection molding and CNC equipment.</p>



<p><strong>Quality First</strong></p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img decoding="async" width="700" height="509" src="https://smallarmsreview.com/wp-content/uploads/2020/08/003-86.jpg" alt="" class="wp-image-9382" srcset="https://smallarmsreview.com/wp-content/uploads/2020/08/003-86.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/08/003-86-300x218.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/08/003-86-600x436.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption>The barrel manufacturing process involves several steps. <strong>Bottom</strong>) The stock material is drilled, button rifled and stress relieved. <strong>2nd from Bottom</strong>) It is then turned and head spaced. <strong>Middle</strong>) The barrel is next chrome lined. <strong>2nd from Top</strong>) The gas port is drilled and the front sight is indexed. <strong>Top</strong>) After passing several quality control checks between each stage, the barrel is finally phosphate finished.</figcaption></figure></div>



<p>With so many companies currently competing in the AR-15 and M16 market, our first question was an obvious one; &#8220;What makes Bushmaster stand out in such a large market?&#8221; Their answer came as fast as the question was asked and was simple enough: &#8220;Q-U-A-L-I-T-Y.&#8221; Even though they have an extremely diverse product line of quality products, the general feeling at Bushmaster is that their quality control is their best selling point. When we asked for an example, we were directed to their Quality Control (QC) building and allowed to sit in as their barrels underwent their normal series of tests.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="237" src="https://smallarmsreview.com/wp-content/uploads/2020/08/004-79.jpg" alt="" class="wp-image-9383" srcset="https://smallarmsreview.com/wp-content/uploads/2020/08/004-79.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/08/004-79-300x102.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/08/004-79-600x203.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>In between each stage of barrel manufacture the barrels are tested using several methods. Left to Right; Air Gauge testing, Bore Scoping and lastly, tested utilizing an Eddy Current.</em></figcaption></figure></div>



<p>Bushmaster barrels are manufactured from Chrome-Moly Vanadium Steel or from 416 Match Grade Stainless Steel. Each process of manufacturing has to undergo numerous levels of testing in order to progress to the next stage of manufacturing. The barrel stock material is first drilled, button rifled and stress relieved. After undergoing a series of QC tests, all barrels that pass are turned to their intended profile and head spaced. Following another round of QC testing the barrels are chrome lined and tested again. All barrels that pass this stage go on to have the gas ports drilled and front sights indexed followed by a phosphate finishing.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="171" src="https://smallarmsreview.com/wp-content/uploads/2020/08/005-65.jpg" alt="" class="wp-image-9384" srcset="https://smallarmsreview.com/wp-content/uploads/2020/08/005-65.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/08/005-65-300x73.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/08/005-65-600x147.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Final assembly of the Bushmaster rifle is completed in many different stages utilizing several work stations. Bushmaster employs over 80 people in their Windham, Maine facility and they have several people who specialize in each aspect of manufacture, production, quality control, assembly and finishing.</em></figcaption></figure></div>



<p>In between each of these steps, the barrels are bore scoped and air gauged. When a barrel is bore scoped a technician runs an extremely powerful microscope all the way down the inside of the barrel. An image is projected onto a monitor and the technician actually visually inspects the inside of the barrel looking for flaws or abnormalities. In the process of testing the barrels with an air gauge, the barrels are pressurized and an indicator rod is slowly run through the length of the barrel watching for a drop or increase in pressure, indicating either a tight area or loose area not visible to the eye even while bore scoping. Any deviation outside of Bushmasters strict specifications will cause the barrel to &#8220;fail&#8221; and it will never see the next step in the manufacturing process.</p>



<figure class="wp-block-gallery columns-1 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex"><ul class="blocks-gallery-grid"><li class="blocks-gallery-item"><figure><img loading="lazy" decoding="async" width="700" height="515" src="https://smallarmsreview.com/wp-content/uploads/2020/08/006-50.jpg" alt="" data-id="9385" data-full-url="https://smallarmsreview.com/wp-content/uploads/2020/08/006-50.jpg" data-link="https://smallarmsreview.com/index.php/2006/01/01/birth-of-a-black-rifle-from-barstock-to-bushmaster/006-50/#main" class="wp-image-9385" srcset="https://smallarmsreview.com/wp-content/uploads/2020/08/006-50.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/08/006-50-300x221.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/08/006-50-600x441.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /></figure></li><li class="blocks-gallery-item"><figure><img loading="lazy" decoding="async" width="700" height="411" src="https://smallarmsreview.com/wp-content/uploads/2020/08/007-42.jpg" alt="" data-id="9386" data-full-url="https://smallarmsreview.com/wp-content/uploads/2020/08/007-42.jpg" data-link="https://smallarmsreview.com/index.php/2006/01/01/birth-of-a-black-rifle-from-barstock-to-bushmaster/007-42/#main" class="wp-image-9386" srcset="https://smallarmsreview.com/wp-content/uploads/2020/08/007-42.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/08/007-42-300x176.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/08/007-42-600x352.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /></figure></li></ul><figcaption class="blocks-gallery-caption"><em>Initial forgings of Bushmaster upper and lower receiver assemblies on the left with their machined counterparts to the right. After machining is done they still must pass another stage of inspection before being finished with a baked dry-lube film and Hard Anodized with a Nickel Acetate final seal coat.</em></figcaption></figure>



<p>To go a step further, even though the barrels undergo Magnetic Particle Testing they are also checked utilizing an Eddy Current. Magnetic Particle Testing is a process fairly common to AR-15 and M16 Barrel manufacturing and most people may have noticed the &#8220;passing marks&#8221; on their barrels in the past. The familiar &#8220;CMP&#8221; mark often seen would indicate Colt Magnetic Particle Testing and &#8220;BMP&#8221; would indicate Bushmaster Magnetic Particle Testing and so on. Magnetic Particle Testing is a process that checks the integrity of ferromagnetic parts by looking for microscopic cracks. During this testing, when a crack is present, an amount of magnetic flux will gather at that spot attracting magnetic particles allowing the flaw to be discovered. Testing with an Eddy Current goes even farther and allows the operator to electronically &#8220;look through&#8221; the metal checking for structural integrity, case depth and hardness while also allowing the ability to &#8220;see&#8221; cracks, pits, seams or otherwise invisible surface flaws. Finally, head spacing is checked on 100% of the Bushmaster barrels rather than just a random sampling.</p>



<p>Bushmaster utilizes a similar quality control regimen on all of their parts including their lower and upper receiver sections as they progress from raw material to the initial forgings to their finished and assembled states.</p>



<p>Once all of the individual parts have passed every step of quality control and final finishing, it is time for their assembly. All firearms assembly is completed in house with each gun going through several &#8220;assembly stations.&#8221; Each station specializes in one specific area of assembly and as the firearms ascend towards completion they end up at the test-firing portion of the facility. Every Bushmaster firearm is laser bore sighted and test fired before being shipped. Every semiautomatic firearm is fired a prescribed number of rounds in rapid succession and every round must feed and fire perfectly in order to pass this final test and go on to inventory for shipping. The test-firing requirement for each full automatic firearm is similar to this, with more rounds fired and the firing is also done in full auto.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="589" src="https://smallarmsreview.com/wp-content/uploads/2020/08/008-33.jpg" alt="" class="wp-image-9387" srcset="https://smallarmsreview.com/wp-content/uploads/2020/08/008-33.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/08/008-33-300x252.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/08/008-33-600x505.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Every Bushmaster rifle is test fired prior to being shipped.</em></figcaption></figure></div>



<p><strong>A Diverse Product Line</strong></p>



<p>Since the early days of the Arm Pistol, Bushmaster Firearms, Inc. has introduced and currently includes an enormous number of items in their product line, with over 50 different firearms and several hundred parts and accessories available for sale. From the typical AR-15 and M16 style firearms used as the primary service weapon of the United States Armed Services for over 40 years, to the newest Carbon Fiber firearms technology, Bushmaster strives to have something for everyone. Their current offerings range in caliber from .22LR variants all the way up to .308 (7.62x51mm NATO) models and range in size from pistol configurations up to their 24-inch heavy barreled varmint series.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="487" src="https://smallarmsreview.com/wp-content/uploads/2020/08/009-32.jpg" alt="" class="wp-image-9388" srcset="https://smallarmsreview.com/wp-content/uploads/2020/08/009-32.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/08/009-32-300x209.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/08/009-32-600x417.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Several racks of finished Bushmaster rifles await shipping.</em></figcaption></figure></div>



<p>The Bushmaster M17S Bullpup Carbine may be one of the most unique firearms in the Bushmaster product line. The M17S affords the shooter a 21.5 inch barrel on a package with an overall length of only 30 inches. It is a short stroke piston, gas operated semiautomatic rifle and is chambered in 5.56x45mm. It utilizes standard AR-15/M16 magazines.</p>



<p>As well as servicing the U.S. commercial firearms market, Bushmaster Firearms, Inc. currently manufactures arms for U.S. law enforcement, governmental agencies and foreign military forces. Short-barreled rifles, law enforcement and post 1986 dealer sample machine guns are all available with prior BATFE (and at times, State Department) approval.</p>



<p><strong>Bushmaster Firearms Inc.</strong><br>999 Roosevelt Trail<br>P.O. Box 1479<br>Windham, Maine 04062<br>(800) 883-6229<br><a href="https://www.remingtonoutdoorcompany.com/bushmaster-firearms" target="_blank" rel="noopener">www.bushmaster.com</a></p>



<figure class="wp-block-table aligncenter is-style-stripes"><table><tbody><tr><td class="has-text-align-center" data-align="center"><em>This article first appeared in Small Arms Review V9N4 (January 2006)</em></td></tr></tbody></table></figure>
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		<title>Bushmaster 25mm Machine Cannon</title>
		<link>https://smallarmsreview.com/bushmaster-25mm-machine-cannon/</link>
		
		<dc:creator><![CDATA[SAR Staff]]></dc:creator>
		<pubDate>Thu, 01 Mar 2001 00:19:06 +0000</pubDate>
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		<guid isPermaLink="false">https://dev.smallarmsreview.com/?p=2031</guid>

					<description><![CDATA[By Robert Bruce Designed in the early 1970’s by engineers at Hughes Helicopters, cannon-caliber BUSHMASTER CHAIN GUNS on the Apache Attack Helicopter, the Bradley Fighting Vehicle, and many other platforms have proven in combat to be without equal in the world. With Hughes having been successively merged with McDonnell Douglas and now Boeing, more than [&#8230;]]]></description>
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<p>By <strong>Robert Bruce</strong><br><br><em>Designed in the early 1970’s by engineers at Hughes Helicopters, cannon-caliber BUSHMASTER CHAIN GUNS on the Apache Attack Helicopter, the Bradley Fighting Vehicle, and many other platforms have proven in combat to be without equal in the world. With Hughes having been successively merged with McDonnell Douglas and now Boeing, more than 10,000 of the 30mm M230 and the 25mm M242 are in service in the US and allied nations, enjoying an unsurpassed reputation for reliability, accuracy and operational effectiveness.</em><br><br><strong>Concepts Compared</strong><br><br>Typically, large caliber automatic cannon suffer from any number of problems that must be addressed by tradeoffs in design. Self-powered guns utilize by-products from firing the ammunition to operate all functions including feed, locking, extraction, and ejection. This means that their parts must be relatively heavy and resistant to extreme stress. Also, even small variations in the ammunition can lead to stoppages.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="463" src="https://smallarmsreview.com/wp-content/uploads/2020/09/002-110.jpg" alt="" class="wp-image-11150" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/002-110.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/002-110-300x198.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/002-110-600x397.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Seen here with its protective translucent plastic cap removed, the M910 TPDS-T (Training Practice Discarding Sabot Tracer) round is easily identified by its needle nose and blue plastic sabot collar. This special 25mm training ammunition is being used on Range 13 instead of the M791 APDS-T (Armor Piercing Discarding Sabot Tracer) combat load. While the training round matches its combat counterpart in velocity and trajectory out to at least 2000 meters, its maximum range is shorter at 8000 meters. Both are “discarding sabot” rounds; the plastic collar peels off the penetrator head immediately after exiting the barrel. Matte green lacquered steel cartridge cases are cheaper to make than brass and the highly reliable Chain Gun feeds and fires them with no trouble.</em></figcaption></figure></div>



<p>Gatling-type weapons utilize external power, usually electric motors or hydraulic systems, to rotate a cluster of barrels into firing position. While this can promote greater reliability and high rates of fire, the penalties tend to be an increase in complexity and maintenance difficulties, a high system weight and bulk, plus a greater cost.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="408" src="https://smallarmsreview.com/wp-content/uploads/2020/09/003-103.jpg" alt="" class="wp-image-11151" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/003-103.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/003-103-300x175.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/003-103-600x350.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>A useful overview of the Chain Gun’s mechanism showing both feeding chambering and ejection. Designed by engineers at Hughes Helicopters in the early 1970’s, the weapon gets its name from the distinctive electric motor driven automobile-type timing chain that precisely controls all movement except recoil.</em></figcaption></figure></div>



<p>In contrast, Hughes engineers offered their single barrel, rotating bolt, electrically driven “Chain Gun,” so called because of its motorcycle type sprocket and chain operating mechanism. Not unlike an automobile engine’s timing chain, the Hughes system provides unparalleled precision, smoothness and positive action to all phases of the cycle of operation.<br><br>Anyone who has been frustrated by the process of separately adjusting headspace and timing on a Browning .50 cal should appreciate how simple and “idiot proof” the Chain Gun is. Each movement from feed to ejection takes place at exactly the right time with no fuss and bother.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="464" src="https://smallarmsreview.com/wp-content/uploads/2020/09/004-90.jpg" alt="" class="wp-image-11152" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/004-90.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/004-90-300x199.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/004-90-600x398.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Empty steel cases and links from the 25mm Chain Gun spill out of the right side of the turret, eliminating the bother of messy brass catchers. Note also the short barrels of the four smoke grenade dischargers that fire screening smoke to hide the vehicle.</em></figcaption></figure></div>



<p>Use of a single barrel means lighter weight, relatively few moving parts, and consistent accuracy. Unlike Gatling system revolving cannon, the Chain Gun’s single fixed barrel is not subject to boresight deviations inherent in multi-barrel clusters, nor to the “lawn sprinkler” effect of tangential velocity as experienced from Gatling pipes spinning at high rate of fire.<br><br>A logical alternative to self-cycling designs is provided by the Bradley’s electrical system as a power source. Operated by a small 1.5 horsepower motor, the M242 runs quite smoothly with little recoil-induced vibration. In the unlikely emergency of a total electrical system failure, a hand crank can cycle the gun for a last-ditch shot or clearing.<br><br>Damping of the short recoil stroke of the barrel is efficiently accomplished with a sealed unit containing ordinary coil springs.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="455" src="https://smallarmsreview.com/wp-content/uploads/2020/09/005-73.jpg" alt="" class="wp-image-11153" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/005-73.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/005-73-300x195.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/005-73-600x390.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>The M240 7.62mm machine gun is mounted co-axially with the 25mm Chain Gun and is aimed using the ISU. This is a license-built American version of the remarkable Belgian FN MAG 58, distinguished by extraordinary reliability and accuracy.</em></figcaption></figure></div>



<p><strong>Dual Feed Not Double</strong><br><br>Dual feed &#8211; its capability to instantly switch over between two types of ammunition &#8211; is one of the more useful characteristics of the Chain Gun design. This means that a gunner who is expecting to engage an armored vehicle can immediately change to a high explosive if an appropriate target presents itself.<br><br>The Chain Gun’s cycle of operation begins and ends with the bolt fully rearward and no round in the chamber. This eliminates “cookoff,” the possibility of accidental explosion of a round left in an overheated chamber. Similarly, “double feed” &#8211; attempt to feed a round when another is still in the chamber &#8211; is blocked by a sensing rotor that instantly tops the feed system if a round fails to extract. In addition to avoiding ugly malfunctions, this eliminates the possibility of catastrophic in- turret explosion from jamming the nose fuze on an HE round being fed.<br><br>Its deceptively simple mechanism is all the more remarkable for its extraordinary reliability. Not only do published figures cite better than 10,000 mean rounds between stoppage, the gun can also be cleared with speed and safety.<br><br>Not surprisingly, the Hughes CHAIN GUN overcame virtually every objectionable aspect of competitive systems and quickly took the lead in the Army’s Vehicle Rapid Fire Weapon System test program. The M242 was formally adopted on 19 February 1973 with the official nickname of BUSHMASTER, the large and deadly poisonous snake of the Central American jungles.<br><br><strong>Ultimate Machine Gun Mount</strong><br><br>Since the hard-hitting, multi purpose 25mm M242 version weighs over 230 lbs and has an effective range in excess of 3000 meters, the best way to maximize its lethality is to put it in what might be called the ultimate machine gun ground mount.<br><br>This is the Bradley Fighting Vehicle, a fully tracked armored weapons platform with a stabilized turret and highly sophisticated day and night sighting systems. Designed to keep up with the M1 Abrams’ main battle tank in the mechanized “AirLand Battle” once envisioned for central Europe, it clearly outclasses its rival, the Soviet BMP armored fighting vehicle.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="518" src="https://smallarmsreview.com/wp-content/uploads/2020/09/006-48.jpg" alt="" class="wp-image-11154" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/006-48.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/006-48-300x222.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/006-48-600x444.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Enormous amounts of ammunition are needed to run Table VIII qualification for a whole battalion of Bradleys and this big, ugly HEMTT (Heavy Expanded Mobility Tactical Truck) is just the ticket. Parked in the staging area behind Range 13, Bradleys are driven right up to the truck to get a basic load of 25mm and 7.62mm ball and tracer ammo.</em></figcaption></figure></div>



<p>As mounted in the Bradley, the Chain Gun has distinct advantages in mobility and crew protection, allowing the gunner to identify and destroy a wide variety of threats including bunkers, other armored vehicles, and even helicopters. And for those situations when the 25mm isn’t ideal, the Bradley turret also features both a 7.62mm M240 machine gun and a pair of TOW missiles, fully integrated with the vehicle’s fire control system.<br><br><strong>Live Fire Gunnery Training</strong><br><br>Small Arms Review was invited to examine the Chain Gun in action with the North Carolina National Guard’s 1st Battalion 119th Infantry Regiment (Mechanized). The Tarheel trackmen were up in my neck of the woods at Fort Pickett, Virginia’s Range 13, spending several weekends rotating Bradley crews through the demanding Bradley Table VIII live fire qualification course. This was a perfect opportunity for me to have plenty of time to observe and photograph all aspects of the training without getting too much in their way at a stressful time.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="451" src="https://smallarmsreview.com/wp-content/uploads/2020/09/007-39.jpg" alt="" class="wp-image-11155" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/007-39.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/007-39-300x193.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/007-39-600x387.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>The tracked and armored Bradley has been called the ultimate machine gun mount because it maximizes effectiveness of the 25mm Chain Gun in an electrically stabilized power turret with highly sophisticated day-night sighting system.</em></figcaption></figure></div>



<p>Under command of Major Greg Lusk, this is a great bunch of guys and I found them to be quite serious about maintaining high standards despite the very real problems of today’s budget- starved military. Master Sergeant Tim Davis, battalion training NCO, wisely hooked me up with a Charlie Company Bradley M2 commanded by Sergeant First Class Dannie Lewis. Along with the gunner, Sergeant James Pierce, Lewis and the rest of his crew patiently answered my endless (and often borderline stupid) questions and provided a step-by-step “show and tell” for photographs as they prepared for their turn at bat.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="410" src="https://smallarmsreview.com/wp-content/uploads/2020/09/008-33.jpg" alt="" class="wp-image-11156" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/008-33.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/008-33-300x176.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/008-33-600x351.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Operational sequence of the Chain Gun barrel recoil. Detonation of a chambered cartridge moves the mechanism back approximately 14 mm, buffered by heavy springs. As the bolt is pushed back in the carrier it is unlocked by an inclined camming slot.</em></figcaption></figure></div>



<p>After a thorough before-operation check of all systems and final preparations of both the Chain Gun and the M240 coaxial machine gun, Lewis’ Bradley pulled up next to the big ugly ammo HEMMT. The Army has a standard load formula for this course so they got the prescribed mix of 25mm M910 TPDS-T plus linked 7.62mm in the usual four ball plus one tracer mix. According to Army specifications, the 25mm Target Practice Discarding Sabot- Tracer matches the velocity and trajectory of real combat ammo well beyond 2000 meters with twin advantages of lower cost and an 8000 meter maximum range that won’t exceed the impact area safety fan limits.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="429" src="https://smallarmsreview.com/wp-content/uploads/2020/09/009-24.jpg" alt="" class="wp-image-11157" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/009-24.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/009-24-300x184.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/009-24-600x368.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>T-Slot extractors on the boltface ensure positive feeding and extraction.</em></figcaption></figure></div>



<p>The gunner, Sergeant Pierce, showed me how the linked 25mm is hung in two separate compartments on opposite sides of the turret, ready for feeding as the situation dictates. A simple diagram is thoughtfully provided on each magazine to make sure the bullets are pointed in the right direction; important soldier proofing to help tired and stressed crewmen. For safety purposes the belts weren’t actually fed into the guns at this time. Instead, this final step was not performed until the vehicle was cleared to move onto the range for its trial by fire.<br><br><strong>Riding the Range</strong><br><br>Wishing them well, I moved up to the main range area for a quick orientation. The sand table was a great place to start, providing a miniature overview of the terrain including firing points and target types. While some might say that this gives an unfair advantage not likely to be experienced in combat, the Army contends that the job of determining baseline gunnery skills should be done in an orderly and standardized manner. Coping with surprise targets on unfamiliar terrain is a higher-level challenge, best done after the crew has proven that it has mastered the basics.<br><br>The range control tower was manned by a team of active Army Master Gunners who had been sent to Ft. Pickett to conduct the Guardsmen’s testing. These guys were making sure that each task in the course was fairly presented and impartially graded. Their work was not made easy by the somewhat poor condition of the whole radio-controlled target system. It performed erratically and sometimes just refused to work, giving the unit’s target detail plenty to do downrange with resulting delays. On a positive note, this gave me an unusual opportunity to ride with them and to get a close look at both the stationary and moving target mechanisms in the enormous impact area.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="462" height="700" src="https://smallarmsreview.com/wp-content/uploads/2020/09/010-17.jpg" alt="" class="wp-image-11158" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/010-17.jpg 462w, https://smallarmsreview.com/wp-content/uploads/2020/09/010-17-198x300.jpg 198w" sizes="(max-width: 462px) 100vw, 462px" /><figcaption><em>Sergeant Pierce hangs a belt of M910 TPDS-T in the AP magazine. A diagram on the door reminds him which way the rounds must point in order to correctly feed into the Chain Gun.</em></figcaption></figure></div>



<p>The effects of eight years of miserly military budgets can be seen in a million ways, big and small, throughout the armed forces; in this case worn-out target lifters paired with old and abused electronic controllers. While Bill and Hillary flew around like a king and queen on Air Force jets, muddy-boot soldiers make the best of a bad situation literally with duct tape, and coat hanger wire. Many have to buy batteries themselves.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="453" src="https://smallarmsreview.com/wp-content/uploads/2020/09/011-14.jpg" alt="" class="wp-image-11159" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/011-14.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/011-14-300x194.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/011-14-600x388.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>The “sand table,” complete with plastic model Bradleys and enemy troops, is a miniature representation of Range 13, used to familiarize crews with the terrain, targets and firing points of the Table VIII gunnery test.</em></figcaption></figure></div>



<p>In the rare situation when everything goes well, the daylight part of the table can be fired by a Bradley crew in about 45 minutes. This includes a substantial amount of time for zeroing and for getting into full chemical gear for Task 6.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="452" src="https://smallarmsreview.com/wp-content/uploads/2020/09/012-11.jpg" alt="" class="wp-image-11160" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/012-11.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/012-11-300x194.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/012-11-600x387.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Mover 1 is the closest of two railroad tracks with electric trollies that carry moving targets across the range.</em></figcaption></figure></div>



<p>The course begins with the vehicle moving up into the first of two fixed firing points identified on the accompanying map as BP2. This is used to zero both the coaxial machine gun and the Chain Gun by optically sighting clearly identified panels positioned 500 and 1100 meters distant. If the tracers hit the panels then the guns are zeroed, if not then it takes some more time and adjustments to get them working together.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="470" src="https://smallarmsreview.com/wp-content/uploads/2020/09/013-9.jpg" alt="" class="wp-image-11161" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/013-9.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/013-9-300x201.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/013-9-600x403.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Puffs of smoke from the 25mm main gun are emphasized by sunlight behind the trees as the</em> <em>Bradley engages a series of targets from its first firing position at BP2.</em></figcaption></figure></div>



<p>When the vehicle commander and gunner are satisfied with their zero then record firing can begin, escalating in degree of difficulty. From stationary Bradley and fixed targets to shooting at trolley-borne movers while on the run, the course presents many realistic situations likely to be encountered in combat. Bare minimum qualification standards require hits in at least seven engagements including one while wearing a gas mask and two at night.</p>



<div class="wp-block-image"><figure class="aligncenter size-large is-resized"><img loading="lazy" decoding="async" src="https://smallarmsreview.com/wp-content/uploads/2020/09/014-9.jpg" alt="" class="wp-image-11162" width="580" height="549" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/014-9.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/014-9-300x284.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/014-9-600x568.jpg 600w" sizes="(max-width: 580px) 100vw, 580px" /><figcaption><em>A view of an M48 target tank sitting about 1600 meters from the firing line through the Bradley gunner’s Auxiliary Sight with 5 power magnification. The greenish tint is caused by special antireflective and laser-proof coating on the optics.</em></figcaption></figure></div>



<p><strong>No Excuses</strong><br><br>When the crew on the hot seat has finished its run, they download and clear their guns then dismount for an unflinchingly honest evaluation. All of the target action for each Bradley’s range time is recorded on gun camera videotape with an on-screen time code, then played back for the crew by a member of the test team like a real-world video game. Each target presentation scenario can be looked at again and again in real time or in slow motion and even stopped for a detailed analysis.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="459" src="https://smallarmsreview.com/wp-content/uploads/2020/09/015-9.jpg" alt="" class="wp-image-11163" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/015-9.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/015-9-300x197.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/015-9-600x393.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>For task 5, the gunner is using his Auxiliary sight to aim the 7.62mm coaxial machine gun at target B11, an enemy truck at 1100 meters. Note tracers and dust impacts.</em></figcaption></figure></div>



<p>This high-teh After Action Review not only allows the Bradleymen to see what they did right or wrong, it also provides the necessary evidence to challenge any miss-scoring that might have happened in the tower such as not leaving the target up for the minimum required time. More than just a series of dry score sheets, these videos give the unit’s leadership a highly objective view of each crew’s proficiency in target identification, choice of the best weapon (main gun vs. coax) fire commands and marksmanship.</p>



<figure class="wp-block-table aligncenter is-style-stripes"><table><tbody><tr><td class="has-text-align-center" data-align="center"><em>This article first appeared in Small Arms Review V4N6 (March 2001)</em></td></tr></tbody></table></figure>
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		<title>SOCOM Manufacturing&#8217;s DIAMOND BR-15</title>
		<link>https://smallarmsreview.com/socom-manufacturings-diamond-br-15/</link>
		
		<dc:creator><![CDATA[SAR Staff]]></dc:creator>
		<pubDate>Thu, 01 Feb 2001 21:07:05 +0000</pubDate>
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					<description><![CDATA[By Jay Bell Several months ago, I received word from Ernest Wrenn, owner of Socom Mfg., a Class 2/3 dealer and manufacturer located in North Augusta, South Carolina, that he was planning on releasing a run of CNC machined billet aluminum AR-15™ style receivers with “SPECIAL” features. “This has been done ages ago&#8230;” I thought, [&#8230;]]]></description>
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<p>By <strong>Jay Bell</strong><br><br>Several months ago, I received word from Ernest Wrenn, owner of Socom Mfg., a Class 2/3 dealer and manufacturer located in North Augusta, South Carolina, that he was planning on releasing a run of CNC machined billet aluminum AR-15™ style receivers with “SPECIAL” features. “This has been done ages ago&#8230;” I thought, thinking about the older models that I had seen, the ones that had been milled out of bar stock. Knowing the prices that some other manufacturers sell billet receivers for, I wondered what would be so good about this latest incarnation of the AR-15™ to justify the imagined cost. So, on an impulse, I asked that Ernie keep me in mind when the product was finished, as I would be interested in looking one over for purchase.<br><br>In the meanwhile I received regular updates from Ernie with some pictures showing various stages of the production&#8230;I could see a lot of unusually shaped bare aluminum, but no real features as of yet. Then, one day, the receiver arrived.” WOW! WHAT A SHOCK!!!!!”<br><br>The “DIAMOND BR-15™” series AR-15™ type receiver is machined from what started out as a 7lb. brick of forged T-6 Aircraft aluminum alloy. Since this was initially a project in design, the billet route was chosen for two specific reasons: strength, and the fact that there were no raw forgings available that would enable the designer to include all the features he wanted.<br><br>For strength, billet is an excellent choice. The material is denser due to the forging process, lending it better strength than a casting of the same size, and also avoiding the weakening inclusions that castings can sometimes contain.<br><br>Also, the billet was an excellent choice if the maker wanted to expand on the proportions of the A-2 reinforcements, and add the other custom features they desire.<br><br>The first thing that struck me was the finish. The first sample I received was silver anodized, not quite matte, but more of a satin finish, similar in look to satin hard chrome. Since I prefer to keep “The Black Rifle” black, I promptly asked Ernie to ship a black anodized receiver to me, which he did, and I made a shooting buddys day by passing the silver receiver to him for purchase. On a quick inspection, both receivers seemed identical, aside from the finish, even down to the exact same tooling marks in the exact same places. After passing through the NICS check system at my FFLs shop, and taking the black stripped receiver home, I was finally able to make a complete examination of the lower.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="460" src="https://smallarmsreview.com/wp-content/uploads/2020/09/002-88.jpg" alt="" class="wp-image-10936" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/002-88.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/002-88-300x197.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/002-88-600x394.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /></figure></div>



<p>I noted how much heavier the receiver seemed than a standard A2 lower from Colt or Bushmaster, and how clean and sharp the markings and lines of the receiver were, especially the edges, which are all beveled and sculpted. On the left side of the receiver was a large “diamond” logo and the serial number, on the right side was the manufacturer markings, model designation, and caliber designation.<br><br>All the machining and engraving was done on a 5-axis CNC mill, Not only does that ensure that there are no hidden fractures from roll stamping, but it also ensures that all the sides are machined fully parallel to the other, there are no off center or angled surfaces that are not designed that way.<br><br>I also noted other features that were rather unusual: 1: All the takedown pin areas were highly reinforced. 2:The rear of the receiver contains a recessed jackscrew that will press against the upper receivers rear lug, and is used to take the wobble or slack out of the upper/lower receiver fit. 3:The receiver sides are easily twice as thick as a standard A2 lower receiver is. This thickness means more stiffness to resist twist or deformation. 4:The lower contains adjustment screws for both trigger reset and trigger stop, accessible through the trigger-guard, which is a solid piece of the lower receiver. 5: The magazine release area is heavily fenced in. 6: All the detent holes seemed to be tapped, except for the one at the front takedown pin. 7: The magazine well has no “taper”, but is instead parallel to the top of the receiver. 8: Fire control markings are on both sides of the receiver in large, easily readable engraved letters: “FIRE” and “SAFE” 9: Included with the receiver was a short list of instructions, some grub screws for the capture pin areas, and a short Inconell pin for the bolt hold-open.<br><br>Since I hadn’t really expected the delivery of the receiver so soon, I was caught empty handed: no lower receiver parts kit! Ernie had said that this would take current mil-spec “small pin” fire-control parts, I made a quick order to Bushmaster Firearms for a lower completion kit. When the kit arrived several days later, I sat down at the workbench and got busy installing.<br><br>True to claims, the semi-auto fire control parts fit into the lower receiver with no problem whatsoever. A longer pin for the hammer would be nice for aesthetic reasons; the receiver is thick, and the pin is inset a tiny bit on both sides. The bolt hold-open was also tapped, which meant that no punches were needed, and no rollpin to install. Just insert the bolt hold-open assembly, insert the pin, and tighten the screw down (too easy).<br><br>The rear takedown pin detent hole was also tapped, and the instructions said that the spring must be shortened to accommodate the capture screw. I took off several coils until I had a good pressure fit, and tightened that screw down. No more lost or bent up springs when switching butt-stocks! Anybody that has switched a stock out has chased these things around&#8230; INCOMING!!<br><br>After I had fully assembled the lower with a Choate “Hook Style” butt-stock and a standard A2 pistolgrip, I started looking at the instructions for the trigger adjustment. Now, adjustable match triggers are a bit pricey, as we all know, but this lower has the feature built right in, just use your standard trigger. The adjustment consists of a pair of screws that are in the bottom of the receiver. These screws can be tightened or loosened to press against the front and rear of the bottom of the trigger to adjust the length of creep, and the trigger reset distance. The instructions give some rather pointed cautions about adjusting the trigger properly. Adjusted too closely, the shooter may experience some “hammer follow” or “doubling” due to improper adjustment, basically , the disconnector could be interfered with. I personally adjusted mine to what felt like a standard AR pull and release, leaving final adjustments to the trigger for a trip to the range.<br><br>Now, since this is a post-ban receiver, none of the other current uppers that I own would’ve been legal for installation since they are in pre-ban configuration, so out come the parts boxes (and the credit card for more parts orders!)</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="482" src="https://smallarmsreview.com/wp-content/uploads/2020/09/003-84.jpg" alt="" class="wp-image-10937" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/003-84.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/09/003-84-300x207.jpg 300w, https://smallarmsreview.com/wp-content/uploads/2020/09/003-84-600x413.jpg 600w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption><em>Close-up of receiver markings.</em></figcaption></figure></div>



<p>I ordered and received a DPMS™ “Hi-Rise” upper from Tom Liemohn (Total Silence MFG, in WA.) This one I chose as a fitting complement, as the upper is very thick and rigid, and includes the proper height riser built in for mounting a telescopic sight.<br><br>In addition, this upper is “slickside”, it has no forward assist or brass deflector, which is no problem for me, since I’m a right handed shooter, and adds to the clean lines of the rifle.<br><br>Also for the upper, I purchased an aluminum free-float handguard, a JP Enterprises adjustable gas-block, and a JP Enterprises single chamber “Recoil Eliminator” brake. The brake is blind pinned and welded to permanently cover the threads on the barrel, making the rifle comply with the ’94 AW ban. All of this was wrapped around a 1/7 twist Colt™ heavy barrel that was a takeoff from another rifle. I topped the whole thing off with glass from Springfield Armory, a 4-14&#215;40 Tactical Government Model™ with the 5.56 range-finding reticle.<br><br>After I assembled the upper fully, I mounted it to the lower, expecting some fitting issues due to the different manufacturers. There were no tightness problems, the takedown pins lined up properly and required no undue force to insert. There was a very slight bit of play between the upper and the lower receivers, and here’s where the upper/lower fit screw comes in handy. Since uppers and lowers from the same manufacturer can sometimes fit poorly, one common recourse to this problem is the “Accuwedge”, the little rubber plug that went under the rear lug of the upper receiver to eliminate play. With this lower, you close the receiver halves, insert the pin, and start tightening the adjustment screw that is found at the rear of the receiver, above the pistolgrip. The interior end of this screw is flat, and pushes against the rear edge of the upper receivers mounting lug, forcing it tight against the takedown pin, completely eliminating ALL upper receiver play, and the associated rattle and instability.<br><br>Now it was time for a trip to the range! The first thing here was to set the JP gas block system for best functioning, this was easily accomplished, and only required a couple of shots. After that, I started fooling with the trigger adjustments. This was also easy, as the adjustment screws are accessible through the bottom of the trigger guard, no need to open the upper to adjust from the top. After several adjustments, I deliberately tried to “over adjust” the trigger to cause a malfunction. In the one extreme I got hammer follow, no doubling at all. In another case, I over adjusted the other way, and could not fire the rifle. At optimum, I currently have the trigger set to about 1/4” of creep before let-off. In rapid-fire, this lets you achieve a rather easy and startlingly fast rate of fire.<br><br>The only difficulty I noticed was that some mil-spec magazines seemed a bit tight in the lower, and were a little difficult to insert or remove from the magazine well, and would not eject fully on their own. On speaking to Ernie about this, he had also seen this, and has corrected this in all further runs of this receiver. He had kept the magwell measurement on the conservative side, and it seems some G.I. magazines have size variances in spec within government contract limits. I have noted this in my Eagle Arms manufactured rifle also, some magazines are just a little bit tighter than others.<br><br>All in all, I feel that this receiver offers the best deal out there as a base for either competition, casual target shooting, varmint hunting, or a great foundation for a post-sample M/16 in heavy pistol calibers that would normally batter a receiver.<br><br>One interesting thing is that the “DIAMOND SERIES” receiver rifle REALLY GETS ATTENTION!!!! While at the range I was asked many times “What kind of rifle is that?”&#8230;”Who makes that rifle?”&#8230;. and from one guy who drove a hot-rodded Chevy Nomad&#8230;”Is that a BILLET rifle? Cooool!” So the rifle does not only FILL the looks department, but also the quality department. As an added note, on my personal receiver, I filled all the lettering on my receiver with white paint, to accent the markings. It sure stands out nicely!<br><br>So, how much will this lower cost? Not as much as you may think! Retail cost for the first run orders is $295, and the price will increase to $350 for any subsequent run of receivers, and dealer pricing is available. Quite a deal since you figure that the average postban A-2 lower is about $110-200 without any of the other features. Also, the receivers are available in black, green, blue, red, gold, and silver anodizing. Silver or Black is the standard offering, the other colors are available for a $25 extra fee. The Diamond lower receiver is also available in Post-Dealer Sample M/16 configuration for a $25 extra fee. Matching billet upper receivers are “in the planning stage”, and entire assembled rifles are also offered.</p>



<div class="wp-block-image"><figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="366" height="700" src="https://smallarmsreview.com/wp-content/uploads/2020/09/004-74.jpg" alt="" class="wp-image-10938" srcset="https://smallarmsreview.com/wp-content/uploads/2020/09/004-74.jpg 366w, https://smallarmsreview.com/wp-content/uploads/2020/09/004-74-157x300.jpg 157w" sizes="(max-width: 366px) 100vw, 366px" /><figcaption><em>Standard receiver on left compared to a BR-15 receiver on right.</em></figcaption></figure></div>



<p>For more information on the” DIAMOND SERIES BR-15” receivers and rifles, contact:<br><br>Socom MFG<br>Dept SAR<br>616 ATOMIC RD<br>N. AUGUSTA, S.C. 29841<br>PH: 803-442-9206<br>http://www.socommfg.com<br><br>AR-15™ is registered trademark of Colt’s Manufacturing Company, Inc.<br><br>Diamond BR-15™ is a registered trademark of Socom Manufacturing, ©2000<br><br>DPMS is a registered trademark of Defense Procurement Manufacturing Services, Inc<br><br>4-14&#215;40 Tactical Government Model™ copyright© 1997 Springfield, Inc.<br><br>Bushmaster™ is a registered trademark of Bushmaster Firearms, Inc. / Quality Parts Co<br><br>Accuwedge™ is a registered trademark.<br><br>Defense Procurement<br>Manufacturing Services, Inc.<br>13983 Industry Avenue<br>Becker, MN 55308<br>Phone (612) 261-5600<br>Fax (612) 261-5599<br><br>Colt’s Manufacturing Company, Inc.<br>P.O. Box 1868<br>Hartford, CT 06144-1868<br>Tel: (860) 236-6311<br>Fax: (860) 244-1442<br><br>JP ENTERPRISES, INC.<br>P.O. Box 378<br>Hugo, MN 55110<br>Voice: 651-426-9196<br>Fax: 651-426-2472<br><br>Springfield Armory<br>420 W. Main St.<br>Geneseo, IL 61254<br>309-944-5631<br>309-944-3676 fax<br>sales@springfield-armory.com<br><br>Bushmaster Firearms, Inc<br>P.O. Box 1479<br>Windham, ME 04062<br>Orders: 1-800-998-SWAT</p>



<figure class="wp-block-table aligncenter is-style-stripes"><table><tbody><tr><td class="has-text-align-center" data-align="center"><em>This article first appeared in Small Arms Review V4N5 (February 2001)</em></td></tr></tbody></table></figure>
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