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	<title>Juha Rintala &#8211; Small Arms Review</title>
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		<title>The Finnish Jati-Matic SMG, The Second Generation</title>
		<link>https://smallarmsreview.com/the-finnish-jati-matic-smg-the-second-generation/</link>
		
		<dc:creator><![CDATA[Janne Pohjoispää]]></dc:creator>
		<pubDate>Sun, 01 Mar 1998 23:44:41 +0000</pubDate>
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		<category><![CDATA[The Finnish Jati-Matic SMG]]></category>
		<category><![CDATA[The Second Generation]]></category>
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		<guid isPermaLink="false">https://dev.smallarmsreview.com/?p=438</guid>

					<description><![CDATA[In a different time, in a different place, he would probably have been another Browning, Stoner or Kalashnikov, but the Finnish political climate in the 1970’s and the 1980’s wasn’t favorable for Jali Timari’s designs or any other private ventures of the small arms industry. Development of Timari’s most successful brainchild, the Jati-Matic submachine gun, started in the 1970’s, and it was introduced in 1980. Personal Defense Weapons (PDW) were not the focus of procurement personnel yet, but it was a time when design trends began to favor creation of compact and lightweight submachine guns.]]></description>
										<content:encoded><![CDATA[
<p>By Janne Pohjoispaa, Photos by Juha Rintala</p>



<p>In a different time, in a different place, he would probably have been another Browning, Stoner or Kalashnikov, but the Finnish political climate in the 1970’s and the 1980’s wasn’t favorable for Jali Timari’s designs or any other private ventures of the small arms industry. Development of Timari’s most successful brainchild, the Jati-Matic submachine gun, started in the 1970’s, and it was introduced in 1980. Personal Defense Weapons (PDW) were not the focus of procurement personnel yet, but it was a time when design trends began to favor creation of compact and lightweight submachine guns.</p>



<p>It all started with a low recoil .22 Short caliber Olympic rapid-fire pistol, which Timari was developing in the mid-1970’s. While Timari was doing test firing with his the.22 Short caliber prototype, an untempered trigger sear suddenly broke, and the pistol switched to full auto. The fully automatic .22 Short pistol shot tight patterns due to its lack of muzzle rise. Exceptional low recoil was achieved by means of a principle borrowed from 19th century coastal artillery pieces (like the 1870’s Armstrong cannon). The pistol had an upward slanting bolt path, guiding the bolt upward to turn a part of the recoil force against the muzzle climb. Jali Timari patented the small arms application of this principle. It led to the creation of two pistols, a blowback operating JAT-22 and recoil operated JAT-9, and most important of all, the Jati-Matic submachine gun.</p>



<p>Since the mid-1970’s, Jali Timari has been a designer and co-owner of Tampereen Asepaja (TAP), a small sporting arms manufacturer located in Tampere, a birthplace of the Finnish machine industry. The origin of TAP traces back to 1923, when Niilo Lahtinen founded it. In the post-WWII period TAP’s main products were sporterized military rifles, but in the 1960’s and 1970’s they switched to manufacturing rifles mainly designed by Jali Timari and Torsti Laaksonen. Their main product was an excellent Lakelander bolt action hunting rifle. Other notable designs were the Caribou pump-action rifle and the Finnbiathlon straight-pull action .22 rimfire target rifle designed for biathlon competitions.</p>



<p>In the late 1970’s and early 1980’s TAP attempted to enter the military small arms business. Timari designed a series of military small arms: 9 mm JAT-9 pistol, 9 mm Jati-Matic submachine gun, 5.56 mm assault rifle, 7.62 mm bolt action sniping rifle and a plastic body hand-grenade, called the “Wildcat”. The Jati-Matic submachine gun and the Wildcat hand-grenade were produced in limited quantities in the 1980’s, and the TAP sniping rifle in caliber 7.62 x 54 R participated in the FDF sniping rifle trials, but was not selected. The 9-mm pistol and 5.56 mm assault rifle never proceeded beyond the drawing board or prototype stage.</p>



<p>Tampereen Asepaja manufactured about 400 Jati-Matics, and around 20 Jati-Matics were manufactured by Gunsmith Esa Tiittanen. The Jati-Matic received a lot of publicity through the world; it was evaluated in numerous American publications including Soldier of Fortune and the Gun Digest Book of Assault Weapons. The strict Finnish export regulations for military small arms guarantied that it found no commercial success. In the late 1980’s Tampereen Asepaja went out of business and production of the Jati-Matic ceased for several years.</p>


<div class="wp-block-image">
<figure class="aligncenter size-large is-resized"><img fetchpriority="high" decoding="async" src="https://smallarmsreview.com/wp-content/uploads/2020/05/001-50.jpg" alt="" class="wp-image-6163" style="width:473px;height:346px" width="473" height="346" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/001-50.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/05/001-50-300x219.jpg 300w" sizes="(max-width: 473px) 100vw, 473px" /><figcaption class="wp-element-caption">Although firing with one hand is not recommended, short burst (3-4) rounds) can be controlled with one hand</figcaption></figure>
</div>


<p>In 1994 Jali Timari sold all rights and production tooling to a new company, Golden Gun, Ltd. formed by Reijo Parviainen and Kari Kurki. In 1995 Golden Gun, Ltd. (Humalistonkatu 9, FIN-20100 Turku, Finland, Phone +358 2 233 0120, fax +358 2 233 0610) began production of an improved model of the Jati-Matic. Re-named as the GG-95 PDW, the new model has the external appearance and basic construction similar to the original TAP-made Jati-Matic, but included several improvements to the original design.</p>



<p>The current political climate is slightly different, and Golden Gun is now marketing the improved version of the Jati-Matic to military and law enforcement purchasers. The GG-95’s were also sold to private collectors in Finland.</p>



<h2 class="wp-block-heading">SUBMACHINE GUN OR MACHINE PISTOL?</h2>



<p>While two hands are required to operate the Jati-Matic, it lacks a shoulder stock, and therefore falls into the machine pistol category. The general design of the Jati-Matic family is very simple. The total number of parts in the GG-95 is 50. Since 1980 the Jati-Matics were manufactured only in caliber 9 x 19 Luger, but caliber conversions, such as the .40 S &amp; W caliber will require only minor modifications to the bolt, a new barrel and new magazine. However, the .40 S &amp; W version or conversion parts do not presently exist.</p>


<div class="wp-block-image">
<figure class="aligncenter size-large is-resized"><img decoding="async" src="https://smallarmsreview.com/wp-content/uploads/2020/05/002-52.jpg" alt="" class="wp-image-6164" style="width:420px;height:296px" width="420" height="296"/><figcaption class="wp-element-caption">The GG-95 fitted with BR’s KRS sound suppressor originally designed for the AK-type assault rifles Note the barrel angle</figcaption></figure>
</div>


<p>Operating principle of the original Jati-Matic and the GG-95 is the common unlocked blowback. The gun fires from an open bolt with a fixed firing pin. According to Timari’s patented idea first employed in his .22 Short caliber target pistol, it has the bolt guided upwards at a 5 degree angle to produce a vertical resultant force to work against the muzzle rise. Due to the wrap-around bolt design adapted from the Czech vz23/24/25/26 series, UZI, Beretta M 12 etc, a majority of bolt mass lies at the front of the gun’s center of gravity. The barrel line is low and close to the shooter’s hand to minimize the torque of recoil force. The general configuration of the gun will also help to reduce the muzzle climb. The breechblock construction together with the long bolt travel (4.4 inches or 112 mm) reduces the rate of fire to a practical level of 600 &#8211; 650 rpm, depending on the ammunition used.</p>



<p>The bolt is machined from an investment cast blank and weighs 0.6 kg (1.42 lbs). It is of two piece construction, consisting of the bolt body and a separate bolt face insert including a fixed firing pin. The bolt body and face are held together by an extractor stamped from spring steel. Bolt face and body can be easily separated for cleaning or replacing damaged parts. The word ‘FIRE’ on the bolt’s left side will appear in the ejection port while gun is cocked. This is a necessary feature, since there is no other cocking indicator and the bolt seals the ejection port in all positions except while ejecting. The bolt has a single recoil spring. The recoil spring’s guide rod rests against the rear buffer, made from elastic, rubber-type material and placed on the joint of the upper and lower receivers.</p>



<p>The GG-95 upper receiver is stamped from a single sheet of 1.2-mm steel plate, while the first Jati-Matics had upper receivers assembled from two pieces by means of spot-welding. The GG-95 upper receiver has no other openings, so it is well sealed against dirt and moisture. The upper receiver has a rectangular cross-section with reinforcing ribs, which will also accumulate dirt and powder residues. The receiver top cover is hinged from its front end to the receiver by a cross pin. The sloping outline of the original Jati-Matic’s top cover led to sighting problems- many operators had a tendency to shoot over the target. The new model is fitted with a receiver cover parallel to the barrel axis, making it better suited for instinctive shooting. The newest TAP-made Jatis appeared with this feature. The GG-95 top cover latch is similar to the original Jati-Matic design, but without an integrated rear sling swivel. The old pattern swivel had a built-in possibility of accidentally opening the top cover. Pulling the sling in the wrong direction opened the cover. The GG-95 has detachable sling swivels that can be mounted on either side of gun.</p>



<h2 class="wp-block-heading">THE LOWER RECEIVER IS MADE FROM PLASTIC</h2>



<p>General coloring of the GG-95 is matte black. For some reason the barrel has a bright blue finish, but all other metal surfaces are bead blasted and then blued. The result is a matte surface, resembling the manganese phosphate (Parkerized) finish. The lower receiver and other plastic parts have similar coloring.</p>


<div class="wp-block-image">
<figure class="aligncenter size-large is-resized"><img decoding="async" src="https://smallarmsreview.com/wp-content/uploads/2020/05/003-49.jpg" alt="" class="wp-image-6166" style="width:420px;height:294px" width="420" height="294"/><figcaption class="wp-element-caption">The current GG-95 on top, and the earlier TAP-made version on bottom</figcaption></figure>
</div>


<p>The GG-95’s lower receiver is injection molded from polymer material called Polyphtalamide, shock resistant and insensitive to oils, solvents and powder residues. The foregrip/cocking handle assembly and some components of the trigger mechanism are also molded from the same polymer. Plastic parts were also widely used with the original Jati-Matic. It was not a surprise that many components of his submachine gun were made from polymer materials. Jali Timari, who had worked in the plastic industry since 1946, has a broad knowledge of manufacturing plastic components and the tools for the process.</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/2020/05/004-42.jpg" alt="" class="wp-image-6165" style="width:420px;height:294px" width="420" height="294" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/004-42.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/05/004-42-300x210.jpg 300w" sizes="(max-width: 420px) 100vw, 420px" /><figcaption class="wp-element-caption">A variety of accessories including extra magazines, carrying case, cleaning gear, sling and holsters are available for the GG-95</figcaption></figure>
</div>


<p>Four screws mate the GG-95 upper and lower receivers. The lower receiver includes the magazine well with the AK-type magazine catch. The lower receiver also houses the trigger mechanism, which is built in a steel-framed module. This trigger module is mounted by means of one cross-bolt, and it can be easily removed for maintenance.</p>



<p>The original Jati-Matic has the fire selector integral to the trigger, similar to the Steyr AUG. A short trigger pull is required for firing single shots and a long pull allows fully automatic fire. Skilled operators can successfully master this type of mechanism, but inexperienced operators will face problems with finding the desired fire mode, especially while working under stress. The GG-95 has a selector switch placed on the left side of the lower receiver with two fire modes, semi-auto and full-auto. Timari designed a trigger mechanism capable of firing single shots, 2 or 3 rd bursts and continuous full auto fire, but the Jati-Matic with this feature never went beyond the prototype stage. Personally, I consider a single shot mode pointless, because the role of this type of firearm will seldom require single shot firing. In any case, there is now a thumb-operated fire selector for all kinds of submachine gunners.</p>



<p>The operation and location of the Jati-Matic and GG-95 safety catch is far from where we are accustomed to using it. The trigger mechanism has no separate safety catch, but the cocking handle/foregrip serves as the safety and locks bolt movement while folded into the carry position. While the foregrip is folded, the gun can safely be carried in Condition One (cocked and locked). A sliding forearm/cocking handle patterned after a typical pump action shotgun forearm was designed after the request of some law enforcement officials. In my opinion, the folding foregrip should be fitted with an integrated, “D”-shaped finger loop, which would speed up bringing the gun into action. The GG-95 has no shoulder stock, but handling and firing characters would improve a great deal if a well engineered folding stock was added on this system. Although Jali Timari didn’t favor the shoulder stock, there was a top folding stock for the original Jati-Matic, made in very limited quantities. The shoulder stock for the current GG-95 could be of the side folding type, which could be removed if desired.</p>



<p>The GG-95 has an 8-inch (203-mm) barrel. The bore has six grooves with a right hand twist of one turn in 9.84 inches (250 mm). The barrel rests over the upper receiver. It contacts the receiver at two points, one at the rear end and the other near the muzzle end. The barrel is held in the correct place and position by two circular rims turned on the barrel, and an indexing stud at the front end of the receiver. The barrel is clamped securely while the top cover is folded down. The barrel has no feed ramp; cartridges are fed into the chamber straight from the magazine. The standard barrel has a plain muzzle without any mounting device for a sound suppressor. After the manner of the original Jati-Matic, a separate suppressor barrel with a threaded muzzle is available for the GG-95. This threaded barrel has a left-handed metric M14 x 1 thread to accept all Kalashnikov-compatible sound suppressors. The left-handed thread prevents suppressor loosening caused by interaction of barrel twisting and the suppressor’s inertia. In the 1980’s, the Jati-Matics were usually equipped with the famous Vaime suppressors, while in the 1990’s the GG-95s are fitted with Finnish BR’s KRS (Kalashnikov Reflex Suppressor) muzzle cans.</p>



<p>The Jati-Matic and GG-95 magazines are of double column type and available optionally with 20 rd, 30 rd and 40 rd capacity. The magazine is very similar to the Carl Gustav 36 round stick magazine but unfortunately not interchangeable with them. The GG-95 won’t accept Carl Gustav, Smith &amp; Wesson etc. magazines or vice versa. The magazine body is made from extruded aluminum alloy and the follower is injection molded from plastic. The similar sized 40 rd magazine is remarkably lighter than the all-steel Carl Gustav/Suomi 36 rd stick, and it is as reliable and easy to fill as original Swedish (for the Carl Gustav M/45) and Finnish (for the Suomi M/31) magazines. No loading tool is required for filling the Jati-Matic family of magazines.</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/2020/05/005-33.jpg" alt="" class="wp-image-6167" style="width:426px;height:556px" width="426" height="556"/><figcaption class="wp-element-caption">The foregrip / cocking handle also serves as a safety. While foregrip is folded (top) alongside the receiver, the Jati-Matic can be carried safely in Condition One. When the foregrip is turned to the vertical position (bottom) the action can be cocked and the gun can be fired.</figcaption></figure>
</div>


<p>Sights are rather crude, but it doesn’t matter because this gun won’t be used for target competitions. Both the original Jati-Matic and the GG-95 have a vertically adjustable foresight and a fixed open notch type rear sight. The GG-95 rear sight is integrated on the top cover latch, while the original Jati-Matic has the rear sight integrated on the lower receiver. The Jati-Matic family will also accept additional sighting devices, which this author considers to be of questionable value. In the early 1980’s, large first generation laser sighting devices of D-cell Maglite size were occasionally fitted on the original Jati-Matics. Currently Golden Gun, Ltd. offers a separate top cover to mount tactical lights and auxiliary sighting devices.</p>



<h2 class="wp-block-heading">HANDLING AND FIRING</h2>



<p>The Jati-Matic and GG-95 are “two hand” weapons without a shoulder stock. They fit in the same category as the H &amp; K MP5K, Famae Mini-SAF and Steyr TMP. The Jati-Matic is apparently less expensive than any of its competitors.</p>



<p>The most significant feature of the Jati-Matic family is exceptional controllability. Even operators without experience with a small sized full-auto firearm can fire long (10 shots or more) bursts and keep every bullet hole in a 12 inch (0.3 m) diameter target at distances up to 15 meters. An experienced operator will achieve far better patterns. Adding an extra weight on the muzzle e.g. in form of a sound suppressor will help to control recoil. In addition the sound suppressor will reduce the risk for hearing damage if the firearm is discharged indoors, as many CQB scenarios will usually require.</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/2020/05/006-25.jpg" alt="" class="wp-image-6168" style="width:441px;height:285px" width="441" height="285" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/006-25.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/05/006-25-300x194.jpg 300w" sizes="(max-width: 441px) 100vw, 441px" /><figcaption class="wp-element-caption">The GG-95 rear sight is a fixed plate with a simple V-notch</figcaption></figure>
</div>


<p>Old TAP brochures used the slogan “Full-Auto Fire With One Hand”. Firing long bursts with any member of the Jati-Matic family with a “one hand” hold will cause poor controllability. The same goes for using a Weaver stance “Two hand” hold. There is a foregrip, so always use it while firing bursts. Some operators fire the Jati’s frequently from underarm and use bullet strikes on target to correct fire. Generally speaking, this is just spraying bullets around, and in conflict with the professional principle that the first shot should count. This is an especially unsuitable method to use in crowded places. Personally I prefer firing aimed bursts holding the gun at eye level with both hands.</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/2020/05/007-24.jpg" alt="" class="wp-image-6169" style="width:426px;height:556px" width="426" height="556" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/007-24.jpg 536w, https://smallarmsreview.com/wp-content/uploads/2020/05/007-24-230x300.jpg 230w" sizes="(max-width: 426px) 100vw, 426px" /><figcaption class="wp-element-caption">The Jati-Matic disassembled for routine cleaning</figcaption></figure>
</div>


<p>While the gun is carried in cocked &amp; locked position, it is brought into action quickly by turning the foregrip to the downward position. Golden Gun, LTD supplies both belt and shoulder holsters, which are patterned after handgun holsters. Larger and heavier submachine guns will require somewhat different rigs. For carrying the original Jati-Matic or the GG-95, I prefer to use a shoulder rig, e.g. similar to the one developed by Eagle Industries for the MP5K.</p>



<p>In our test firing, two types of 9-mm ammunition were used. We had Finnish Lapua-made 9 mm ball fitted with a 115 gr. (7.5 g) FMJ bullet loaded to nominal muzzle velocity of 1330 fps (405 mps) close to NATO specifications, and Lapua 9 mm subsonic round fitted with a 150 gr. (9.7 g) CEPP (Controlled Expansion Police Projectile) bullet. During the course of test firing, about 400 shots were fired. No malfunctions were observed.</p>



<p>Recently there has been a lot of discussion about successors to the 9-mm Luger. While it would be interesting to test fire a 5.7 x 28 mm caliber version of the Jati-Matic, it seems that the 9 mm Luger caliber handguns and SMG’s will remain as the world standard in the foreseeable future. Advanced ammunition technology and millions of guns around the world chambered for that cartridge make this likely. The 9 mm Luger, a workhorse of many wars and different ideologies, is still going strong and even more popular than ever before.</p>



<p>One feature in the Jati-Matic and the GG-95 bothers me little: there are accessory components required for mounting other accessories. Personally I think that the basic implements like a sound suppressor or a tactical light should be mounted on any firearm of this type with a minimum effort.</p>



<p>In this form or rather with some diminutive modifications including the re-engineered cocking handle and shoulder stock, the attractively priced GG-95 will be a potent competitor for other subguns or machine pistols of similar size.</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/2020/05/008-18.jpg" alt="" class="wp-image-6170" style="width:253px;height:535px" width="253" height="535" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/008-18.jpg 331w, https://smallarmsreview.com/wp-content/uploads/2020/05/008-18-142x300.jpg 142w" sizes="(max-width: 253px) 100vw, 253px" /></figure>
</div>


<h2 class="wp-block-heading">The GG-95 submachine gun specifications</h2>



<ul class="wp-block-list">
<li><strong>Caliber: </strong>9 x 19 mm Parabellum</li>



<li><strong>Operation:</strong> Blowback, fires from an open bolt. Selective fire trigger mechanism fires both single shots and burst fire.</li>



<li><strong>Feed mechanism:</strong> Detachable staggered-row box magazine for 20, 30 or 40 rounds</li>



<li><strong>Barrel:</strong> Six grooves with a right hand twist of one turn for 9.84 inches (250 mm).</li>



<li><strong>Lengths: Overall: </strong>14.8” (375 mm) Barrel: 8” (203 mm)</li>



<li><strong>Weights:</strong> (empty) 3.63 lbs (1.65 kg)</li>



<li><strong>Sights:</strong> Protected post front, adjustable for windage. Fixed rear.</li>



<li><strong>Finish:</strong> Blued</li>



<li><strong>Manufacturer: </strong>Golden Gun, Ltd, Humalistonkatu 9, FIN-20100 Turku, Finland. Phone +358 2 233 0120. Fax +358 2 233 0610.</li>
</ul>



<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 V1N6 (March 1998)</em></td></tr></tbody></table></figure>
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		<title>RPK: THE WORLDS MOST POPULAR LMG, OR AN ASSAULT RIFLE ON STERIODS?</title>
		<link>https://smallarmsreview.com/rpk-the-worlds-most-popular-lmg-or-an-assault-rifle-on-steriods/</link>
		
		<dc:creator><![CDATA[SAR Staff]]></dc:creator>
		<pubDate>Mon, 01 Dec 1997 00:38:37 +0000</pubDate>
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					<description><![CDATA[In 1961, the Soviet Red Army took a major step in small-arms deployment by replacing the belt-fed 7.62x39mm RPD (Ruchnoy Pulemet Degtyareva) light machine gun with a magazine-fed RPK (Ruchnoy Pulemet Kalashnikova) LMG, also firing the 7.62mm M43 intermediate round. While the Soviets viewed this as a step forward, many small-arms authorities viewed this decision as a step backwards since the new weapon was neither as robust nor as well suited to delivering sustained fire as its predecessor. As its external appearance suggests, the RPK is a spin-off of the AKM assault rifle that is fitted with a heavier barrel and a light bipod. The first RPK prototypes were built on machined AK-47 receivers in the mid-1950s, but when the RPK went into production in 1961, the receiver was switched to the stamped AKM-pattern. The AKM had been adopted two years earlier, in 1959.]]></description>
										<content:encoded><![CDATA[
<p>By Janne Pohjoispää, photos by Juha Rintala</p>



<p>In 1961, the Soviet Red Army took a major step in small-arms deployment by replacing the belt-fed 7.62x39mm RPD (Ruchnoy Pulemet Degtyareva) light machine gun with a magazine-fed RPK (Ruchnoy Pulemet Kalashnikova) LMG, also firing the 7.62mm M43 intermediate round. While the Soviets viewed this as a step forward, many small-arms authorities viewed this decision as a step backwards since the new weapon was neither as robust nor as well suited to delivering sustained fire as its predecessor. As its external appearance suggests, the RPK is a spin-off of the AKM assault rifle that is fitted with a heavier barrel and a light bipod. The first RPK prototypes were built on machined AK-47 receivers in the mid-1950s, but when the RPK went into production in 1961, the receiver was switched to the stamped AKM-pattern. The AKM had been adopted two years earlier, in 1959.</p>



<p>Designed by Mikhail Kalashnikov, the RPK appeared in public for the first time in the 1966 May Day parade in Moscow’s Red Square, but Western intelligence agencies were aware of its existence before then. Like most other small arms manufactured by the Soviet Union and its allies, the RPKs were distributed to many countries under Soviet influence as well as to communist insurgents conducting their so-called wars of liberation. RPKs have, therefore, seen action in most conflicts throughout Southeast Asia, Central America, the Middle East and Africa since the 1960s.</p>


<div class="wp-block-image is-style-default">
<figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="493" src="https://smallarmsreview.com/wp-content/uploads/2020/05/001-12.jpg" alt="" class="wp-image-5597" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/001-12.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/05/001-12-300x211.jpg 300w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption class="wp-element-caption"><em>The design of the RPK rear sight is similar to the sights used on Kalashnikov assault rifles, but the RPK sight is fully adjustable for both windage and elevation</em></figcaption></figure>
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<p>Thanks to the prolific distribution of Soviet small arms to friendly countries and groups, there are probably more RPKs around the world than any other magazine-fed LMG. The RPK and RPK-style guns were manufactured at least in China, Finland (Valmet LMG 76 and LMG 78), Iraq (Al-Quds), North Vietnam (TUL-1), and Rumania and Yugoslavia (M65, M72, M77, M82). Some of these weapons can be called RPK-style guns because they are based on a milled AK-47 receiver rather than on a stamped AKM receiver. Certain RPK variants are semiautomatic-only guns aimed at the civilian marketplace. Not all RPK variants were designed for the role of squad automatic weapon, however. The RPK has also served as the basis for several sniping rifles. Perhaps the best known RPK-based sniping rifle is the Rumanian FPK, which is chambered for the full-powered 7.62x54R round. Valmet also made a 7.62x51mm sniping variant of the LMG 78 for a short time. The Iraqis fielded a semiautomatic sniping variant of the Al-Quds chambered for the unsuitable 7.62x39mm M43 cartridge. The RPK family’s complete caliber selection includes chamberings in 5.56x45mm and 7.62x51mm for the Western marketplace.</p>


<div class="wp-block-image is-style-default">
<figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="543" height="700" src="https://smallarmsreview.com/wp-content/uploads/2020/05/002-15.jpg" alt="" class="wp-image-5596" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/002-15.jpg 543w, https://smallarmsreview.com/wp-content/uploads/2020/05/002-15-233x300.jpg 233w" sizes="(max-width: 543px) 100vw, 543px" /><figcaption class="wp-element-caption"><em>The RPK has a lightweight, folding bipod mounted permanently near the muzzle.</em></figcaption></figure>
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<p>While a fixed-stock RPK is the most commonly encountered variant, a folding stock version chambered for the 7.62mm M43 cartridge, called the RPKS, can also be encountered. In 1974, introduction of the AK-74 assault rifle chambered for the 5.45x39mm M74 cartridge was followed by the introduction of a 5.45x39mm light machine gun, the RPK-74, and a folding stock variant, the RPKS-74.</p>



<p>At this point, one might wonder if the RPK or any other weapon of similar pattern is really a light machine gun or simply an assault rifle with a heavier barrel and bipod. After all, virtually all members of the RPK family lack a quick-change barrel and fire from a closed bolt. Therefore, such a weapon can only deliver limited sustained-fire capability. Guns of this type are called machine guns because they are put in a role of the machine gun, not because they incorporate all desirable MG or LMG features. Back in the era of semiautomatic and bolt-action battle rifles, such designs were simply called automatic rifles. Modern designations like the light support weapon (LSW) more accurately describe their role. There are other machine gun definitions, too. To the anti-gun media, every small arm is a machine gun or assault weapon. Remarkably, the average sportsman buys into this errant terminology, as long as his side-by-side shotgun or pre-64 Winchester is not criticized by the media.</p>



<p>From a technical viewpoint, the RPK is pretty much an AKM fitted with a longer and heavier barrel and bipod. Yet some of it’s details are in fact borrowed from the AK-47 and RPD. Most RPK parts and components are interchangeable with the AKM assault rifles. Interchangeability simplifies both production and usage. This is likely the main reason why the belt-fed RPD was not replaced by another belt-fed design, but rather by a magazine-fed pseudo-machine gun, the RPK. Fielding a light machine gun very similar to an assault rifle simplifies the training of infantrymen as well as armorers, which is a particular advantage if it is employed by an army based on large reserves. This is the real genius behind the design of the Ruchnoy Pulemet Kalashnikova.</p>



<p>While the first RPK prototypes were built on AK-47 machined receivers, production models have stamped receivers. The receiver sub-components are stamped from sheet steel and assembled by spot welding. The barrel extension, which is machined from solid steel, is mated to the receiver by rivets. The most visible difference between the RPK and the AKM receiver is the RPK’s more massive barrel extension, which requires an enlarged frontal section of the receiver. The difference is clearly visible. The RPK’s receiver cover is similar to the AK-47 without the reinforcing ribs typical of the AKM.</p>



<p>The RPK’s breech block and gas system are identical to the AKM. The AK-type action is neither ammunition nor moisture sensitive and will provide reliable functioning under the most adverse conditions. Like its assault rifle counterpart, the RPK fires from a closed bolt, which is not the best method for weapons shooting continuous full-auto fire. Prolonged firing can heat the chamber to the point that cook-offs can occur, and the barrel rifling can be damaged by sustained firing.</p>


<div class="wp-block-image is-style-default">
<figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="162" src="https://smallarmsreview.com/wp-content/uploads/2020/05/003-17.jpg" alt="" class="wp-image-5598" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/003-17.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/05/003-17-300x69.jpg 300w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption class="wp-element-caption"><em>While sometimes referred to as the “Russian Dragunov”, the semi-automatic FPK is just an RPK chambered in the 7.62&#215;54 round</em></figcaption></figure>
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<p>The RPK does have a longer and heavier barrel than standard AK-47 or AKM assault rifles, which does improve heat dissipation to some degree. Barrel length is 23.3 inches (59.1 cm). The bore has four grooves with a right hand twist of 1 turn in 9.25 inches (21.0 cm). Like most military small arms of Warsaw Pact origin, the bore and chamber are chrome lined. Chrome lining provides better durability and corrosion resistance against powder and primer residues. Many people seem to have the wrong idea about wear resistance. It doesn’t mean that the bore will better resist wear from friction generated by steel-jacketed bullets. A different process is at work. Steel-jacketed bullets have a poor ability to conform to rifling and thus seal the combustion gases behind the projectile. Chrome is not as reactive as steel, so chrome plating is eroded less by the blow-by of hot combustion gases.</p>



<p>The RPK is poorly suited to the machine gun role, where long bursts or sustained firing are required. For that purpose, the barrel is too light and has no proper cooling system. Furthermore, the RPK barrel is not a quick-change design; instead, the barrel mounts permanently on the barrel extension by means of threads like the AKM barrel. However, at least one RPK variant—the Yugoslavian M65B—features a quick-change barrel.</p>



<p>Like the AK-47 and AKM assault rifles, the RPK muzzle has a left-handed metric M14x1 thread. It was originally intended for mounting a blank-firing adapter, but the threads have been subsequently used to accept various grenade launchers and sound suppressors. There is no compensator after the AKM fashion, but threads are protected with an AK-type nut. Fortunately, the RPK has no bayonet lug, unlike most other Soviet small arms including sniper rifles.</p>



<p>The RPK has a selective fire trigger mechanism similar to the AKM. It has a single trigger sear (instead of twin trigger sears used with the AK-47) and a rate reducer which delays backward movement of the hammer. However, the value of the rate reducer is doubtful. Both the AKM with rate reducer and the AK-47 without a rate reducer produce an equal rate of fire: 600 rpm. Because its longer barrel increases the amount and pressure of gas available to piston, the RPK has a slightly higher rate of fire: 660 rpm. Bear in mind, however, that these rates of fire are theoretical and depend greatly on ammunition.</p>



<p>The Soviet-made RPKs usually have furniture made from laminated wood. The fore-end has no longitudinal swells typical to the AKM, but otherwise the fore-end as well as the hand guard and pistol grip are patterned after Kalashnikov assault rifles. RPD stocks are made from various materials, and different shapes can be encountered. The sling swivels are mounted on the left side of the gun, and they accept an AK-type sling with a leather loop on one end and a metal hook on the other.</p>



<p>The shape of the butt stock reveals that the RPK should be fired from a bipod rest. The butt stock is patterned after the RPD, and it allows a support hand to grasp underneath the stock. This style of marksmanship could be referred to as “European,” while the practice of grasping the top of the stock with the nonfiring hand could be termed the “American” style of firing an LMG. Like most other small arms produced in the Eastern Bloc, the RPK has a remarkably short length of pull. The distance from the trigger to the butt plate is only 12 inches (30.0 cm). The short butt stocks are well suited for operators of somewhat smaller stature than the average American or operators wearing heavy winter clothing.</p>



<p>The Russian-made RPKS features a side-folding butt stock made from laminated wood and patterned after standard-issue RPK fixed stock. Yugoslavian variants have the same MP38/MP40-style stock folding underneath the receiver as used with AK-47 and AKM rifles.</p>



<p>Like most AKM rifles of Soviet and other Eastern European origin, the RPK usually features a painted black finish. However, blued and parkerized (manganese phosphate) guns can also be encountered.</p>



<p>The cleaning rod is located beneath the barrel. Other cleaning gear and a general purpose tool is carried in a stamped steel capsule placed in a compartment located in the butt stock.</p>



<p>The RPK bipod appears to be a simplified variation of the RPD bipod. It is mounted permanently near the muzzle. This arrangement provides maximum accuracy when engaging a stationary target but inhibits the gunner’s ability to traverse for engaging moving targets. The bipod’s hinge and mounting piece are machined from solid steel, and its legs are stamped from sheet steel. The bipod does not feature a provision for height adjustment. Despite its simple design, the bipod is rugged. Finally, there is no provision to fasten the weapon to other mounts.</p>



<p>All 7.62x39mm Kalashnikov magazines are interchangeable. The magazines especially designed for the RPK are a 40-round curved box magazine and a 75-round drum.</p>



<p>The 40-round magazine is similar to a standard issue 30-round staggered row box magazine, but it is longer and slightly more curved. While the longer magazine provides an additional 10 rounds, it seriously handicaps the maneuverability of the whole system. A 40-rounder works fine at the shooting range, but in rough terrain, the long magazine can interfere with firing the weapon from the bipod. In the field, it is much better to use a standard 30-round magazine or a 75-round drum.</p>


<div class="wp-block-image is-style-default">
<figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="471" src="https://smallarmsreview.com/wp-content/uploads/2020/05/004-15.jpg" alt="" class="wp-image-5600" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/004-15.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/05/004-15-300x202.jpg 300w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption class="wp-element-caption"><em>The RPK’s butt stock is shaped after it’s predecessor, the RPD light machine gun</em></figcaption></figure>
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<p>The Soviet-made drum is completely different from the more frequently distributed Chinese design. The Soviet drum has no openable back cover, but it is loaded with loose rounds (or with a clip guide and stripper clips, if there is one available) from the top. The Soviet-made 75-round drum magazine is reliable, and it provides a lower profile than a 30-round magazine.</p>



<p>The Soviet RPK’s front sight is similar to the AK-47 or AKM rifles; it is a rectangular post with protective ears, not a hood as used with Chinese variations. A tangent-type rear sight has a U-shaped notch. In addition to its basic Kalashnikov design, the RPK rear sight is fully adjustable for both windage and elevation. The range scale is optimistically graduated to 1,000 meters. However, due to physical limitations and moderate external ballistics, the RPK’s effective range is no more than 400 meters.</p>


<div class="wp-block-image is-style-default">
<figure class="aligncenter size-large"><img loading="lazy" decoding="async" width="700" height="282" src="https://smallarmsreview.com/wp-content/uploads/2020/05/005-12.jpg" alt="" class="wp-image-5599" srcset="https://smallarmsreview.com/wp-content/uploads/2020/05/005-12.jpg 700w, https://smallarmsreview.com/wp-content/uploads/2020/05/005-12-300x121.jpg 300w" sizes="(max-width: 700px) 100vw, 700px" /><figcaption class="wp-element-caption"><em>The RPK disassembled for routine cleaning Photo by Tuomas Makela</em></figcaption></figure>
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<p>Some RPKs have a rail-type scope mounting bracket on the left of the receiver. It is presumably intended for mounting an infrared or passive night sight, but not an ordinary rifle scope. There is no specific nightscope intended for the RPK. But according to the new Russian classification method, all current-issue small arms have an “N” suffix in their names if they have scope-mounting capability. For example, the scope-fitted (either 4 power 1P29 scope or passive night sight) 5.45x39mm RPK-74 is called as the RPK-74N.</p>



<p>Handling and disassembly procedures for the RPK follow the familiar Kalashnikov pattern. If you can handle and fire any AK-47 or AKM variant, you can fire the RPK. There are thousands and thousands of people who can’t read or write, but are nevertheless experts at handling and firing the Kalashnikov family of weapons.</p>



<p>The RPK in all its guises is the most widely distributed—but certainly not the best—LMG available in the world today. It is too light to provide good controllability for full-auto firing, and it’s closed bolt operation limits it’s ability to deliver sustained fire. On the other hand, the RPK is light and maneuverable, so it can be easily carried in difficult terrain. Fitted with a full 40-round magazine, the RPK weighs just 13.4 pounds (6.1 kg). The RPK’s similarity to the AK-47 and AKM facilitates the training of troops who must use and maintain these weapons. This similarity also lowers the cost of production, enabling the fielding of this LMG in greater numbers. While the RPK may not have the quality of the RPD it replaced, the deployment of the RPK brings to mind Stalin’s comment to Churchill that “quantity has its own quality.” Clearly, deployment of the RPK and its variants remains quite logical from a certain point of view. Nevertheless, perhaps the Ruchnoy Pulemet Kalashnikova should be viewed as an assault rifle on steroids rather than as a true light machine gun.</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 V1N3 (December 1997)</em></td></tr></tbody></table></figure>
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