By Chris A. Choat

WINCHESTER AMMUNITION RELEASES NEW M-22 SUBSONIC .22LR AMMO

Winchester Ammunition delivered one of the most significant innovations to hit the rimfire world in 2013 with the introduction of the 17 Winchester Super Magnum, but where new rimfire loads are concerned, the company is far from done. In 2016, Winchester Ammunition continues to invest in its rimfire product line with the development of a new M-22 Subsonic .22 LR round. 

The M-22 is designed specifically to function in semi-automatic firearms, while remaining subsonic from both pistol and rifle length barrels. The new M-22 Subsonic features a 45-grain black-plated lead round nose bullet that has the equivalent energy of full velocity 36-grain rimfire products. In addition, the M-22 Subsonic utilizes non-corrosive priming and clean burning powder for reduced muzzle flash. The M-22 Subsonic was also created with suppressed firearms in mind, but performs just as well in unsuppressed rifles and handguns. During Winchester testing, M-22 Subsonic rounds measured 129 dB from an unsuppressed rifle. That is significantly quieter than a full velocity .22 LR fired from a suppressed rifle, which typically measures around 138 db. With the addition of a suppressor, M-22 Subsonic achieves a remarkably quiet 116 db. The M-22 Subsonic will be available in 100-round plastic packs and 800-round bulk packs. Visit them at www.winchester.com.

DESERT TECH BEGINS PRODUCTION OF THEIR MDR

Desert Tech has announced that it has begun production of the much anticipated Micro Dynamic Rifle (MDR) and rifles are scheduled to start shipping 2nd quarter of 2016. The MDR rifle is one of the most anticipated rifle release of 2016. In anticipation of the large demand for the MDR, Desert Tech has invested and installed over $3.5 million in brand new state of the art CNC machines that are dedicated to the production of the MDR. “We have expanded every aspect of the Desert Tech production capabilities in 2015 and with the new equipment in place, 2016 is set to be a very exciting year,” said Nick Young, CEO of Desert Tech. “The precision and complex capabilities of the MDR make it a true Micro Dynamic Rifle,” said Cory Newman, Chief Engineer of Desert Tech. Desert Tech will begin taking pre-orders for MDR rifles starting Tuesday, January 19th, 2016. Dealers can pre-order by calling their orders into Desert Tech. Desert Tech is also accepting consumer orders through their website (www.deserttech.com), consumer orders will be delivered to their local dealer. See more at www.deserttech.com.

AIMPOINT ANNOUNCES NEW MAGNIFIERS

Aimpoint, the originator and worldwide leader in electronic red-dot sighting technology, has announced the addition of three new accessory magnifiers to their product line. Designed to work in conjunction with the company’s electronic reflex sights, these new magnifiers are being offered in 3X and 6X magnification, in both a standard grade for use by civilian shooters, as well as professional grade models.  The new Aimpoint magnifiers feature diopter adjustment, allowing each optic to be individually adapted to the operator’s eye. All are protected by shock absorbing protective rubber covers that also provide an ergonomic grip surface. The Aimpoint magnifiers may be used with the company’s quick-detach TwistMount™, or with the newly launched Aimpoint® FlipMount which allows the magnifier to be quickly flipped in or out of the optical axis, or removed from the firearm completely. Their standard grade 3X-C is a great magnifier at a very reasonable price point. On the professional side, the Aimpoint 6XMag offers 50% more magnification than existing US military combat optics, and allows an operator to quickly transition back to their non-magnified Micro T-2 sight for CQB. For more information on Aimpoint, visit the company’s webpage at: www.aimpoint.com.

FLIR SCOUT TK THERMAL MONOCULAR

The FLIR Scout TK is a pocket-sized thermal vision monocular/camera for exploring the outdoors—at night and in lowlight conditions. Scout TK reveals your surroundings and helps you see people, objects and animals over 100 yards (90 m) away. Simple to use, with still image and video recording, Scout TK is the perfect companion, whether in the back country or your own backyard.  The new monocular weighs only 6 ounces and has several video color palettes to enhance viewing including White/Black hot, InstAlert™, Rainbow, Iron, Lava, Arctic and Graded Fire. It offers single-handed operation and has a simple 4-button, intuitive user interface. The new unit is ruggedly built and is weather resistant. You can use it to check for predators, search for missing pets, scan parking lots and parks in the dark. It has an internal rechargeable Li-Ion battery that provides up to 5 hours of run time. The unit comes with a neck lanyard, lens cap and a USB cable for transferring your photos and videos. For more on the Flir Scout TK go to www.flir.com.

CZ-USA INTRODUCES NEW SCORPION EVO & BREN 805 CARBINES

On the heels of their introduction last year of the highly successful Skorpion EVO and Bren 805 pistols, CZ-USA has now introduced carbine versions of these weapons. Available in two variants, the Scorpion Carbine is a whole new animal. Building on the lauded submachine gun platform that first hit the US civilian market in pistol form in 2015, the Carbine has a 16.5” barrel fitted with either a two-port compensator or a faux suppressor built specifically for CZ-USA by SilencerCo. Fit with the factory’s folding adjustable stock, the Carbine features a number of US-made parts to make it fully 922® compliant. One of the nicest features of the firearm is the newly-designed forend, covered in M-LOK attachment points to keep the profile slim while still big enough to swallow most pistol-caliber suppressors should the owner decide down the road to convert it to an SBR for use with a suppressor.  Low-profile aluminum adjustable sights round out the platform, and a top Picatinny rail allows the mounting of a wide number of optics.  For those who would prefer to own a Bren 805 in rifle form without having to jump through all the hoops of converting their pistol version into an SBR, the Bren is now available in carbine form with a 16.2” barrel. Equipped with the factory’s folding adjustable stock, it also has a new set of flip-up adjustable iron sights. Chambered in .223/5.56 and using the ubiquitous STANAG magazine from the AR16/M16, it easily accepts optics and lights on its top and bottom Picatinny rails. An effective two-port muzzle brake helps keep the Bren solidly on target and also reduces recoil and muzzle flip. Both carbines as well as the original pistol versions will now also be available in Flat Dark Earth. Find out more at www.cz-usa.com.

CAA INTRODUCES NEW RONI® MODELS WITH ARM BRACE & MICRO RONI

CAA, developers and manufacturers of advanced battle-tested firearms accessories, debuts two RONI® models featuring the SB® Tactical Stabilizer Brace®, enabling one-handed firing of the Micro and RECON* by attaching it to the operator’s forearm. The Stabilizing Brace provides controlled support while minimizing the accuracy robbing spin and shift that often accompanies one-handed shooting. The Stabilizing Brace is adjustable and flexible with a hook and loop fastener for a custom fit for any user. The brace was originally designed for wounded warriors and others with a disability or otherwise incapable of securely holding a firearm. The STAB-RONI® is constructed from high quality elasto-polymers to exacting tolerances. Both models are designed for the GLOCK® 19/17 pistol. The RONI® platform requires no pistol disassembly at all. Simply drop the pistol in the kit and it locks within seconds. Many of the features on RONI® are ambidextrous, including the trigger-guard safety, a super-fast cocking handle and right and left serrated thumb rests for better recoil control and muzzle rise. Additional features include a forward mounted extra magazine holder, integral forward flashlight mount, Picatinny rails for two sighting devices and additional side rails. Both the Micro RONI® Stabilizer and the RONI® RECON Stabilizer are available in black. MSRP is $546.00 for the RECON and the Micro will be announced at a later date. Visit them at www.caagearup.com.

LMT DEFENSE ANNOUNCES COMPRESSOR PDW

LMT Defense is excited to announce they are releasing the Compressor™ personal defense weapon, a nimble AR-platform that is easily concealed but fully capable. Responding to an international military customer request, LMT Defense set out to create a versatile rifle-caliber weapon capable of being small while packing a powerful punch. What resulted is the smallest AR profile in the industry paired with the most reliable upper receiver configuration possible – the LMT Defense monolithic upper receiver and 10.5” barrel, which has already proven itself in 35 countries around the world. The Compressor is expected to start shipping at the end of the first quarter of 2016. The Compressor features a 10.5” barrel, chambered in either 5.56 or .300 Blackout, along with a modified SOPMOD stock, extension tube, redesigned buffer and buffer spring, along with a drop-in weight for the bolt carrier that delivers a fully operational weapon, suppressed or unsuppressed without operator changes, at an overall length of 24.5”. This small profile is ideal for law enforcement agencies in need of increased maneuverability or for VIP protection to engage at distances proven unreliable with a pistol. LMT Defense is also releasing a PDW Conversion Kit, replacing five key components that make it backward compatible with any Mil-Spec M4/AR on the market: modified SOPMOD stock, shortened extension tube, re-designed buffer and buffer spring, and a drop-in weight for the bolt carrier. This will reduce the length of any standard AR weapon by 2.75” overall and works reliably for 5.56 and .300 Blackout, either suppressed or unsuppressed, without operator changes. The LM8PDW556 will retail for $2,691.02. The PDW-KIT will retail for $455.00. Find out more at www.lmtdefense.com.

The 40mm grenade launcher is a specialized firearm. It’s typically not the first firearm grabbed for an afternoon of fun, isn’t always economical to shoot, and isn’t conducive to typical “plinking.” Nevertheless, there’s something about a grenade launcher that draws smiles from the shooter and the surrounding crowd that inevitably forms when firing one on the range. Lewis Machine and Tool (LMT), long known for their high quality firearms and parts teamed up with ALS Technologies, long known for their extensive catalog of 37mm and 40mm caliber ammunition, to build a single shot 40mm grenade launcher.

Designed by ALS to be an affordable 40mm launcher, the unit was intended to overcome three major shortcomings of the current 40mm systems on the market: ease of use, cost, and weight. Dave Dubay of ALS explained: “We eliminated features that we deemed unnecessary from the launcher. Other than a sight, there aren’t too many accessories that will make sense on a 40mm launcher. As a result, we eliminated quad rails on the unit, for a significant weight reduction.”

Weighing in at about 4 pounds, the 40LMTS features an expandable stock and adjustable front vertical grip. A Picatinny rail mounting is provided to allow the user to mount an optic; bead sights are provided as standard equipment on the launcher for use with close range, less lethal munitions. The Picatinny top rail will accept nearly any enhanced optics/sighting systems, including the current Meprolight unit that incorporates a laser range finder and adjustable sight picture. Other units, like the side mounting L3 EOTech GL sight may prove more difficult, but not impossible to mount to the weapon.

The 40LMTS will fire standard 40mm Less Lethal ammunition, up to 4.8 inches in cartridge length (standard length for parachute flares and similar type signal rounds) as well as most medium velocity H.E. 40mm ammunition. This weapon (like all other shoulder fired 40mm systems) is NOT designed to fire 40mm high velocity ammunition. High velocity 40mm ammunition features a cartridge case that measures 53mm in length, and will not chamber within a 40x46mm low velocity 40mm system.

Three major features set the 40LMTS system apart from other 40mm systems currently in the market – the use of a true M4 collapsible butt stock, simplicity and ease of trigger mechanism, and the incorporation of an external hammer. “From an ease of use standpoint, incorporating an M4 collapsible butt stock was a no-brainer,” said Dave Dubay. “Everyone knows how to use an M4 butt stock, while also allowing the multiple length of pull to accommodate smaller shooters or law enforcement users wearing thick ballistic vests.” While the 40mm LV round does not produce significant recoil, shooters will want to have the firearm braced firmly when firing. Being able to adjust the length of pull on the system allows for more comfortable shooting, and greater accuracy – an important end result when using high explosive or less lethal rounds.

Internally, the system utilizes standard Smith and Wesson model 686 revolver parts. When examining 40mm systems overseas, parts availability is a major issue. Being able to use standard Smith and Wesson parts allows foreign end users to repair the launcher by potentially cannibalizing more common Smith and Wesson revolvers, rather than try to source hard to find parts made solely for the launcher. From a quality standpoint, use of Smith and Wesson parts likely means that failure of the trigger mechanism is very remote.

In the event that there is a misfire or the round does not initiate after the hammer drops, the external hammer allows the user to re-cock the weapon and fire it again. This feature has not been seen in a commercially viable 40mm system since the Heckler and Koch Model 69 launcher that also incorporated an external hammer. While this may seem odd, the incorporation of an external hammer creates a large advantage to the shooter in being able to fire the weapon without having to open the chamber on a live round.

Because the 40LMTS is double action, there is no external safety. The trigger pull in double action was not measured, but is significant. When firing 40mm high explosive, one wants to be positive that the trigger is being engaged via deliberate action. In single action, the trigger pull was crisp and manageable. The barrel release mechanism is ambidextrous, and allows easy one-handed opening with or without gloves.

Although a unit was not made available for test firing, the 14-inch barrel is predicted to provide sufficient accuracy and velocity. In a 40mm system, the shorter barrels (like the HK M320, 9-inch barrel) pose accuracy issues due to lack of barrel length to produce sufficient velocity. Future testing will measure projectile velocity from the 14-inch barrel, as well as test for accuracy. Fit and finish of the sampled weapon was impressive, as would be expected of an LMT product.

Suggested retail price for the 40mm unit is $699, and is available exclusively through ALS Technologies. A non-NFA version in 37mm is available for law enforcement agencies that do not wish to pursue NFA firearms, and for shooters that reside in non-NFA localities. Additional information may be found online at www.alstechnologies.com. Lightweight and rugged, the 40LMTS features precision machining and engineering found in every weapon system produced by LMT.

Specifications

Greg Felton of Law Enforcement International (LEI) in the UK, was trying to meet the requirements of a friendly Government to supply a 7.62x51mm “Designated Marksman Rifle.” No product on the market met the client’s particular specifications. Greg brought in Karl Lewis of Lewis Machine & Tool (LMT) from the U.S. After much brainstorming about the needs to be filled by this new rifle, Karl and Greg started in on the project. The client wanted select-fire capability, but the first designs were kept to semiautomatic only, with a 16-inch barrel. By good fortune, as final development and trials on the semiautomatic were completed, the British MOD published an “Urgent Operational Requirement” (UOR) solicitation for such a rifle for immediate deployment in Afghanistan. The rifle was submitted for trials and the design won the competition, was contracted for and designated as the L129A1 rifle, with the vernacular name as the “Sharpshooter Rifle;” comparable to the U.S. DMR (Designated Marksman Rifle). LMT and LEI have now finished development of the select-fire version, as well as some rifles with shorter (13.5-inch) barrels and other options – but that’s another story…

In essence, Lewis Machine & Tool’s semiautomatic rifle, the LM308MWS, has been selected by British MOD as the new Sharpshooter rifle. The version of this rifle was in competition with the FNH SCAR-17 (Mk17 Mod 0), the HK model 417, Sabre Defence’s XR-10 and offerings from Knights and Oberland Arms. When the competition was over, LMT’s rifle was designated as the L129A1. It has been several decades since MOD has changed rifles for the longer range duties, and the new L129A1 is geared towards the 800 meter ranges being encountered in today’s combat environment. The AI .338 bolt action replaced and upgraded the AI L96 7.62mm several years ago. “Sharpshooter” is a completely new role for the British Army. Quick reaction, rapid follow up shots, long range, harder hitting than 5.56mm is the idea for the L129A1, but the sniper rifle is still a bolt action.

Greg Felton from LEI explained the ammunition requirement to SAR:

“The ammunition criteria stated by the MOD was that the rifle was to be able to use both RG 155-grain sniper ammunition, plus M80 ball and tracer, including de-linked machine gun belts. In the end during their trials with the various competitors, they found that the 155-grain fired so much better than the standard ball that it was made the official issue ammunition for the weapon. As to what it is “matched to,” we (Karl & I) designed the rifle to use both standard ball and 168-grain Match. With a 1:11.25 inch twist it works well with these weights, however, the heavier 175-grain projectiles need a faster twist for best results at longer ranges.”

The LMT Monolithic Rail Platform is a one piece milled upper receiver that includes four rails to the front, providing a stable platform for returning devices to zero on installation. It also allows for a free floating barrel that is interchangeable for different lengths, although not in this particular issue.

The initial order of 440 L129A1 Sharpshooter rifles has been added to several times now. The L129A1 has been in combat in Afghanistan since April 2010, and has received excellent field reports from the troops.

At SHOT Show 2004, a new black rifle was introduced that was not just a copy of the standard design that most of the industry produce. This black rifle would move the family of weapons into new uncharted territory. Karl Lewis, president of Lewis Machine & Tool (LMT) introduced the MRP, the monolithic rail platform.

The MRP is the first monolithic upper receiver. The upper receiver is machined from a single 7075 T6 aircraft aluminum forging. There are four solid Mil-Std 1913 rails and permit complete zero retention for optics or any other accessory placed on the rails. The upper receiver is equipped with a forward assist, fired cartridge case deflector as well as an ejection port dust cover. All rails are numbered for easy replacement of optics to insure they are placed back in the same position from which they were removed. Removable sling swivel mounts are placed on the end of the MRP at the 3, 6 and 12 o’clock positions. Additionally, mounting points are located on the right and left side at the rear of the handguard area by the ejection port. This permits any type of sling or desired location for the operator’s discretion.

The innovation does not stop with the development of the first one piece monolithic rail platform. The barrel, held in by two bolts, is removable by the user. When the bolts are removed the barrel/gas tube assembly is pulled straight out of the receiver. This enables the 5.56mm caliber weapon to be configured for whatever mission it will be used. If a close quarter combat environment is the mission, a 10.5 inch barrel may be used. If the mission is urban or normal combat ranges, a 14.5 or 16 inch barrel may be used. If longer range is required, an 18 or 20 inch barrel may be used. It should be noted the 16 inch 5.56mm barrel uses a mid-length gas system and all others use a standard carbine gas system. All is accomplished at the user level; no armorer is needed to change out the barrels. The barrels are manufactured from machine gun barrel steel and button cut rifling. They are cut with the Mil-Spec 1 turn in 7 inch twist allowing up to 80 grain projectiles to be stabilized. The barrels have chrome plated bore and chambers and are equipped with an A2-style compensator. With Lewis Machine & Tool being a U.S. government contractor for many different parts, they are familiar with what Mil-Spec means and what it takes to achieve it. All barrels manufactured by Lewis Machine & Tool are proof tested with a 70,000 psi proof cartridge and then magnetic particle inspected to insure the barrels are free of stress fractures. When the barrel is installed in the MRP, the barrel is completely free floating. This increases accuracy as well as the air holes in the MRP circulate air to aid in cooling. The removable barrels also enable another innovation: the MRP is a multi-caliber weapon as different caliber barrels can be used. Complete changing of the barrel is accomplished in less than 5 minutes.

The MRP provided for this evaluation came with many enhancements that are all Karl Lewis. Starting with the sights, the rifle was provided with the LMT BUIS (Back Up Iron Sight). This is a fully adjustable rear sight that has been provided to the U.S. Navy and SOCCOM for the MK18 CQB 10.3 inch carbines. The sight is identical to that of the standard M16A2 or M4. The front sight is removable and held on by a nut. It has the traditional triangular shape and square front sight post. Of course, being a Mil-Std 1913 rail, any BUIS can be mounted.

The charging handle has an improved latch that is easier for one to grasp as it is made wider so it is easier to actuate.

The bolt and carrier are also a significant departure from the norm. When Lewis looked at the new design, he looked at the specific operating dynamics of the carbine and how different it is from the rifle. Given the different dynamics, Lewis designed the bolt and carrier to function with that in mind. To begin with, the bolt carrier has had several modifications. Due to the dynamics of the carbine, the bolt unlocks at a faster rate on a carbine length gas system than a full length rifle. Owing to this quicker action, there is still residual pressure in the cartridge case and it is still somewhat expanded when the rifle starts to extract making the extractor and extractor spring work that much harder to extract that cartridge case. It also causes extractor springs to wear quicker than that of the rifle. SOCOM has added rubber O-rings to increase the extractor force to cope with the wear issue. The standard GI M4 has a new and improved extractor spring (copper in color) that is designed specifically for the carbine to increase extractor force. Lewis also redesigned the geometry of the cam track by increasing the dwell time upon unlocking and thus permitting additional time for the residual pressure to drop allowing much easier cartridge extraction. He also added an additional gas relief port to get rid of unneeded gas.

The bolt was also redesigned with durability on mind using proprietary material that is significantly stronger than standard bolt material. Due to its hardness it is more expensive to procure and more expensive to machine than standard bolt steel. The geometry of the locking lugs has been modified as well. There are stress relief cuts that allow more flexing of the lugs to prevent breakage. The extractor has been redesigned as well. The improved “lobster tail” extractor uses two extractor springs instead of one that significantly enhances the reliability of the extractor in adverse conditions. The extractor claw is considerably more aggressive and stronger as well. Like the barrels and as per Mil-Spec, all LMT bolts are proof tested and them magnetic particle inspected.

The lower receiver has many enhancements as well. The stock is the LMT SOPMOD stock and is the stock assembly purchased by USSOCOM and the U.S. Navy for the M4A1 carbines and the MK18 CQB weapons. The stock is triangular in shape and very smooth. There are two removable sling mounting points on the stock as well as a cut-out for a standard GI silent sling. There are two battery compartments that are water resistant tubes placed inside of the stock and there is a removable rubber butt plate as well. The receiver extension is also designed by LMT and has six positions as opposed to the standard M4 which has 4 positions. The provided pistol grip is the Ergo Grip that is extremely comfortable and with the finger grooves is comfortable and makes the rifle stable in the shooting hand in adverse conditions. Also provided on the lower receiver is the Ergo Grip Gapper. This little spacer covers the gap in-between the front of the pistol grip and the trigger guard. LMT’s proprietary ambidextrous selector lever is also provided. This is not just good for left handed shooters but can be just as useful to right handed shooters as well given the tactical situation. Tangodown rail covers were provided on the rails.

The rifle was outfitted with the new EOTech XPS2-2 two dot reticle holographic sight. Extremely compact, this sight uses a single 123 battery and has a battery life is 500 to 600 hours. This sight only requires 2.75 inches of rail space. Along with the sight is the EOTech Generation II 3X magnifier. This comes with a Samson Quickflip tilting mount attached to an A.R.M.S. throw lever mount. When disengaged, the magnifier sits to the right side of the rifle: when engaged for long range shooting it flips back.

Also attached to the rifle was the Insight Tech M3X tactical light with pressure pad activation that was mounted in a Tangodown vertical foregrip. By just removing a spacer, the pressure pad sits in the grip. The grip also is hollow allowing for additional storage.

The magazines chosen for the rifle are the Magpul PMag, one of the finest magazines available anywhere in the world for the Black Rifle. This magazine is a significant reliability enhancement to any member of this family of weapons. The constant curve design allows the shot column to sit in its natural shape and increase feed reliability.

The ammunition for this test was provided by Silver State Armory (SSA). SSA is known for manufacturing some of the highest quality duty and match ammunition in the industry at competitive pricing. Silver State Armory just moved to a state-of-the-art facility in Packwood, Washington where they have a 100 meter underground range and the facility meets United States Department of Defense requirements to manufacture military contract ammunition. They manufacture their own brass. All SSA ammunition is loaded with custom blends of powder geared towards the specific loading. They offer several loadings in 5.56mm, 7.62mm NATO, 6.8SPC and .499 LWRC. They are also one of the only ammunition manufacturers in the United States to manufacture armor piercing rifle ammunition in 5.56mm, 7.62mm NATO and 6.8SPC.

More than 300 rounds of SSA 5.56mm 55gr FMJ rounds were fired through the MRP for function testing and no malfunctions were encountered. There were 200 rounds of SSA 5.56mm 77 grain OTM cartridges fired as well. Groups at 100 yards kept around 1.75 inch groups consistently with the FMJ rounds. All in all, this barrel has had more than 500 rounds through it and as it has broken in the groups had tightened up. First groups fired with the SSA 5.56mm 77 grain OTM were consistent at 1.75 inches. The last groups fired with this ammunition were printing consistently at 1 MOA.

LMT Piston Operated MRP

The industry has gone through a piston craze over the last few years. Although there is no statistical data proving the superiority of piston operation over direct impingement, there has been a market for piston operated weapons in the AR-platform. When asked why LMT began producing piston operated rifles, Karl Lewis simply said “customer demand.” Good enough of an answer.

The versatility of the MRP made it the ideal platform for the piston operated LMT offering. The piston is part of the barrel assembly. The gas block on the barrel has been altered to accept the end cap, piston, operating rod and spring. It is held together as an assembly so the assembly is inserted into the MRP and locked down with the two bolts. The one-piece bolt carrier was modified too for use with the piston. The impact area (key area) of the carrier is machined into the bolt carrier giving strength and durability to the carrier. All the gas relief ports have been eliminated. Skis have been added to the bottom of the rear of the carrier to prevent carrier tilt caused by the off-center movement caused by the impact of the operating rod on the bolt carrier. To remove the piston assembly from the barrel, depress the detent and rotate the end cap and pull outward. Now the operating rod and spring can be removed for maintenance. The piston operated system requires the use of the heavier H2 buffer (two tungsten weights and one steel weight). The MRP piston barrels are offered in both 5.56mm as well as 6.8mm Rem SPC.

Provided for testing was both the 16 inch as well as the 12 inch CQB barrel. More than 300 rounds of Silver State Armory 5.56mm 55gr FMJ ammunition was fired with no malfunctions. More than half of that was fired on fully automatic utilizing a Colt M4 lower receiver. Slightly more recoil and muzzle flip was noticed with the piston operated system

Converting the MRP to Fire 6.8mm Rem SPC

The absolute finest innovation of the MRP is its easy ability to convert to fire a different cartridge. LMT currently makes barrels in 5.56mm and 6.8mm Rem SPC. LMT has also tested calibers in 6.5 Grendal, 5.54x39mm and 7.62x39mm. Provided with the MRP test rifle was the barrel and bolt to convert the rifle to fire the 6.8mm Rem SPC cartridge. The 5.56mm barrel was unbolted and pulled out of the MRP and the 6.8mm barrel put in its place and the bolts torqued down to 140 inch pounds. The bolt was removed from the bolt carrier and replaced with an enhanced bolt chambered for the 6.8mm Rem SPC cartridge. LMT provided four Precision Reflex, Inc. 25-round magazines. Also provided by C Products were five of their steel 25-round magazines.

The first 300 rounds fired were SSA 110 grain Nosler Accu Bond cartridges. No malfunctions were encountered. With this ammunition, the groups at 100 yards remained at 1.25 inches off of a bench. For accuracy, the SSA 115 grain Sierra OTM Match rounds were used. Groups measured at a consistent 1 MOA. Recoil was noticeably more than the 5.56mm but not enough to mention firing on semiautomatic. SSA also manufactures an armor piercing round in 6.8mm Rem SPC. It consists of a pointed carbide core with a machined brass sabot offering an incredible barrier penetration. It penetrates with ease a 1/2-inch thick Mil-A-12560 class 1 armor plate out of a 16 inch barrel at 100 meters at a velocity of 2,800 feet per second.

In research into weapons chambered for the 6.8mm Rem SPC it was noticed there are two different chambers. They are referred to as the spec 1 and type 2 chambers. The spec 1 chamber is the one which has a SAAMI specification and has a .050 freebore. The spec 2 chamber has .100 freebore, which permits longer projectiles (better ballistic coefficient). Additionally, the longer freebore decreases pressure 4-5,000 psi. With a 115 grain projectile, a spec 1 chamber will give 2,425 feet per second and a spec 2 chamber will give a higher 2,575 feet per second. As of this writing a significant number of manufacturers are making their 6.8mm Rem SPC barrels with the spec 2 chamber; however, some remain with the SAAMI spec chamber. This is due to the standardization in chamber drawings. There is a rumor going around that a new chamber specification, which is the spec 2 chamber will be introduced to SAAMI as the 6.8x43mm. As of this writing, only Silver State Armory and one loading in Hornady TAP line is loaded to the spec 2 pressures. Silver State Armory loads both commercial and spec 2 loads. Before shooting spec 2 ammunition in your rifle, consult the rifle manufacturer to determine which chamber your rifle has.

The Lewis Machine and Tool MRP is truly in a category of its own and is the benchmark for the modularity of the M16/M4 weapon system: one receiver, multi-caliber barrels and available in both direct gas as well as piston operated. More caliber offerings are most certainly on the horizon. With all the barrel lengths and calibers offered, the MRP will do just about any job required of it. Whether it is a CQB environment with the 10.5 inch barrel or hunting medium game with the 6.8mm Rem SPC, this one size does fit all. Selective fire versions of the MRP are available to both law enforcement as well as military customers. With the proper tax stamp and compatible state laws, short barreled versions of the MRP can be had by the general shooting community. LMT has been a forerunner in new developments and innovation, which will bring the M16/M4 well into the new decade and beyond.

If the television reality-show craze were to momentarily abort political correctness and expand into the gun world, there could certainly be potential in a new series called Pimp-My-Rifle. Just like the auto industry and the homebuilders have done, a bone-stock firearm could be presented for enhancement and returned to its owner in a highly modified configuration. Unfortunately, for the time being, no such reality show exists but thanks to the folks at CAA, many upgrades from mild to wild can privately be accomplished with a single phone call.

Plastic Rifle Popularity

There are several companies who specialize in manufacturing AR-15 style rifles in configurations too numerous to list here. The popularity of the semiautomatic version of America’s primary service weapon has exploded onto the civilian gun scene in the last decade evidenced by the number of major “sporting rifle” manufacturers who have added a version of the Black Rifle to their lineup. A firearm once considered on the fringe, or of limited interest, the AR-15 style rifle is no longer only being produced by specialized companies catering primarily to a military or law enforcement market. Eying a desirable and profitable market share, such well-known manufacturers as Remington, High Standard and Smith & Wesson seem to have now embraced the firearm that companies such as Colt, Bushmaster, DPMS, Olympic Arms, DoubleStar, and so many others have specialized in for decades.

With so many gun owners joining the ranks of the Black Rifle Owners Club, there has been a major influx of new ideas, points of view and weapon objectives brought forth by the fresh customer base and a desire to adapt this platform to their particular shooting discipline. This has, in turn, boosted the accessory market in volume and innovation. Jumping directly into the deep-end of the demand issue, CAA has a huge line of accessories for these rifles that continues to grow at an amazing pace. Their product line creates an environment where someone can purchase a standard, basic rifle and accessorize it for their particular purpose. Unfortunately, there have been specific cases where sensory overload occurred (too many available options and configurations) at a time when a purchase was about to be made and has led to a lost sale because the potential buyer wanted to “buy the right rifle the first time” and needed to do more research before buying.

Overload Problem Solved

One of the greatest advantages of the Black Rifle is the complete modularity built into the system. Almost any configuration in almost any caliber can be obtained with a little assistance from the aftermarket accessory industry. This means that for some shooters, especially those new to the AR-15 style rifle, the initial purchase can be as easy as a stripped-down, basic rifle, and it can be later customized to fit the specific criteria the new owner would desire. As well as making the initial purchase easier, this strategy has the potential to save the end user a substantial amount of money. Best of all, the configuration can be altered again, an unlimited number of times if desired, if a different or ever-changing end use should occur.

From Practical to Tactical… and Beyond

There is always plenty of discussion about what is considered a legitimate and useful accessory versus what constitutes an accessory deemed silly or ineffective. Ultimately this decision has to be the choice of the end user. This statement comes with a few light-hearted warnings.

• Black Rifle Bling – If you find something you can’t live without, hanging off the barrel of your Black Rifle, but it is a little “outside the box,” the ribbing from your peers is just part of the game. There are several accessories available and only you can decide what will meet your requirements. A light, a fore-grip or a laser, are usually acceptable in most shooting social circles. A bayonet lug mounted multi-blade combination lock-pick and hot dog fork might not.
• The 20-pound Light Rifle – Almost universally taunted by veteran AR-15 type rifle owners are those who purchase every accessory to the point of concealing the identity of the original firearm, and are often lightheartedly referred to as “Mall Ninjas” or “Internet Commandos.” Some guns have been intentionally over-accessorized and photographed for the web to poke a little fun at these, and some are even quite humorous. You will have to decide what you need for your new rifle based on the purpose you want it for. Just don’t mount everything you can find, anywhere it will fit, all at once.

If you are new to these rifles and maybe a little overwhelmed by the number of accessories available, consider these previous points your fair warning. They may save you some seemingly vicious but light-hearted ribbing.

The Right Touch

In order to demonstrate a series of practical upgrades to a base rifle, this writer contacted Command Arms Accessories (CAA) and explained the concept. They were asked to choose some of their popular accessories for a “makeover” on a basic rifle. In a very short period of time a few boxes arrived with several accessories and with the addition of a few components laying around the workshop, the first magazine version of Pimp-My-Rifle was underway.

The base rifle we started with had a low-end collapsible stock, a flattop upper receiver, standard front carbine-length forend, stock pistol grip and a traditional front sight & gas block.

• Stock – The makeover started at the rear and moved forward towards the muzzle. The first step was to deal with the factory stock. It was replaced with a CAA Collapsible Stock. This new stock gives the shooter a better cheek-weld and includes a no-slip rubber recoil pad as well as a small compartment that holds 4 CR123 Batteries, a short Picatinny accessory rail and an optional push-button sling swivel.
• Sling – With a mounting hole at the front of the new stock available, a one-point sling from CAA was chosen for this application. One-point slings work well in tight quarters and assist in weapon retention while incorporating quick-detach connection points.
• Pistol Grip – The stock pistol grip was replaced with a CAA Ergonomic Grip. This grip is a little wider, incorporates finger grooves and completely fills the space above the grip to the rear of the receiver for a very comfortable hold.
• Sights – Since this rifle had only a flattop receiver and standard front sight post, a combination of dot-type scope and adjustable iron sights were added and co-witnessed. They can be used in combination with each other or used individually if necessary or desired. The rear sight chosen was an LMT Tactical Adjustable Rear Sight. It is completely adjustable for windage and elevation. The red-dot scope chosen was a 30mm S.P.O.T. scope and mount from MGI Military. With several dot intensity settings this sight performs well in all light conditions.
• Rail System – Possibly the most versatile, and arguably the most popular, accessory of this rifle platform is a front rail system that allows for the attachment of numerous accessories. Since this was a project utilizing a base rifle with a standard upper receiver and front sight post, a TDI Arms X6 rail system was chosen. Manufactured from solid billet aviation aluminum, this 2-piece, 6-rail system simply replaces a standard carbine-length handguard and works in conjunction with the standard front sight. It is a drop-on rail installed with the factory delta ring and tightened with 5 bolts to secure the system. The top MIL-STD 1913 rail matches the height of the factory flat top rail to facilitate multiple accessories. Unused rail surfaces were covered with the assistance of an X6 Thermal Rail Cover Kit.
• Front Vertical Grip – The particular grip chosen for this project met a few different criteria. We used a CAA Flashlight Grip Adapter. This vertical front grip mounts on the front rail and accepts a standard 1-inch flashlight. Tactical lights with a rear button can utilize the built-in thumb switch in both a constant on and a momentary on mode. Lights with a pigtail-style pressure switch are also accommodated with built-in mounting surfaces.

Enough is Enough

Since we earlier made light of those who over-accessorize their rifles, we were cautious not to fall into that category with this build. Those who either need more accessories or just different accessories can rest well knowing that we didn’t even scratch the surface of the available items. For a full listing of CAA accessories you can visit their website at www.commandarms.com. Be prepared to be there for a while. There are numerous variants of the items we installed such as stocks, grips, mounts, slings and several other accessories not included such as magazine clamps, stock accessories, lasers and mounts, bipods and much more. They also carry accessories for many more firearms than just AR-15 style guns including AK47s, Uzis, P-90s, MP5s, Galils and several handguns.

Sources

Command Arms Accessories
76 Vincent Circle
Ivyland, PA 18974
Ph: (267) 803-1518
Fax: (267) 803-1002
www.commandarms.com

Lewis Machine Tool Company
1305 11th Street
W. Milan, IL 61264
Ph: (309) 787-7151
Fax: (309) 787-7193
www.lewismachine.net

MGI Military
102 Cottage Street
Bangor, ME 04401
Ph: (207) 945-5441
Fax: (207) 945-4010
www.mgimilitary.com

Ever since the change over from the 7.62x51mm to the current 5.56x45mm there has been controversy between two fundamental schools of thought on what a military cartridge should be. The United States military can be summed up in one word: tradition. In the 1960s, that tradition clouded the vision that a new dawn of small arms development in both concept, mechanics and ammunition had come. Still entrenched in the “one shot, one kill” mentality, our soldiers were sent into combat in Vietnam with the M14 which many considered to be an inferior weapon to the AK47 assault rifle that the enemy used. The enemy were able to lay controlled large volume of automatic fire on positions which, in a meeting engagement, will win you a fight. Our soldiers were equipped with a heavy recoil rifle that was impossible to control on fully-automatic. The accuracy was of no use because the enemy could not be seen.

With much trepidation, the military adopted the AR-15 rifle destined to become the M16/M16A1. A new age of small caliber high velocity cartridges gave way to providing an individual soldier with firepower he had never had before. The 5.56x45mm cartridge utilizing a .224 diameter 55-grain full metal jacketed bullet proved to be a great asset to the American fighting man with the ability to have a lightweight rifle that was completely controllable on fully-automatic fire and the soldier could carry more than twice the combat load with an M16 than he could with the heavy M14 rifle.

The Third Generation M16A2 and M855 Ball

With the product improvements of the M16A2 the weapon system was enhanced. Due to the heavier 62-grain bullet, 1 turn in 7 inch rifling twist and new fully adjustable rear sight, both penetration and long range accuracy were enhanced. However, the culprit of the future problems with ammunition terminal performance would come from the ammunition, the M855 Ball.

The M855 Ball is a three piece bullet consisting of a copper jacket, lead plug and a steel penetrator core in the tip. This bullet was designed for a machine gun, not a rifle. With the onset of the Global War on Terrorism, terminal deficiencies were found using M855 Ball, particularly in M4 carbines, when striking thin, malnourished, Taliban and Iraqi soldiers. There was a serious inconsistency in at what point the bullet would yaw and splinter. Some lots of ammunition would penetrate only slightly within inches and yaw and splinter. Others would go straight through and never yaw nor splinter. This caused serous knockdown problems particularly with the decreased velocity of 14.5 inch carbine barrel.

A solution put forth by the United States Special Operations Command (SOCOM) was the creation of a new and improved 5.56x45mm cartridge that would increase long range accuracy and terminal performance with consistency. Accuracy is seriously degraded in the M16A2/A4/M4 due to the inherent characteristics of the M855 bullet. The penetrator core degrades accuracy and if not manufactured properly, the center of gravity will be off causing the bullet to become a “flyer.” Additionally, in the area of terminal performance, there was no consistency from lot to lot on what exactly it would do upon hitting a human target.

The answer was the Mk 262 MOD 1 cartridge that SOCOM adopted. This is a Sierra 77-grain open tip match bullet loaded by Black Hills. This is undoubtedly the most effective 5.56x45mm military cartridge in the world manufactured to match grade specifications with combat reliability. The long range accuracy was drastically increased and its terminal performance enhanced. This new projectile works well regardless of the type of target and performs considerably better on human targets in all known distances and conditions. This round is used almost exclusively by SOCOM operators in their M4A1 carbines and Mk12 rifles. This solution satisfied most of the SOCOM operators: except for one.

The 6.8x43mm REM SPC

The 5th Special Forces, particularly MSG Steve Holland, felt that there was still room for improvement. The concept was not original. The U.S. military experimented with the possibility of the 6mm caliber projectile being the ideal compromise of accuracy, range and terminal performance. In the late 1970s the concept was abandoned in favor of the 5.56x45mm battle rifle.

With the assistance of the U.S. Army Marksmanship Unit, Holland came up with a concept for a 6mm cartridge that could be fired in the M4 platform. The starting point was the .30 Remington cartridge which is merely a rimless .30-30 Win. round. It was trimmed and resized to accept a 6.8mm projectile. This concept, along with the hand-loaded experimental ammunition and CAD drawings went to Remington Arms. Remington wanted to aid in the Global War on Terrorism so they took on the task of developing the ammunition.

The 6.8mm REM SPC cartridge has been mostly a myth for the last few years due to the fact it has been developed quietly and kept proprietary. No ammunition has been made as of this writing in large quantities due to the fact the ammunition is being perfected before it will be shipped. Remington has reported three small runs of ammunition including ball and match grade ammunition. Hornady has also produced some loads in this new caliber.

The Firearms

Prototype rifles were manufactured by Precision Reflex, Inc. (PRI). Dave Dunlap assembled upper receivers with free floating handguards or A.R.M.S., Inc. SIR systems and the OPSINC silencer and muzzle break. Dunlap also was charged with designing the magazine which is different from the standard 5.56x45mm magazine. Currently, PRI has been the only producer of 6.8x43mm Rem SPC magazines. PRI also produces complete upper receivers chambered in the 6.8x43mm Rem SPC cartridge.

The Barrett M648

At the 2004 SHOT Show, Ronnie Barrett unveiled a new product line: his M648. This company, dedicated to .50 BMG caliber specialized weapons, introduced the first production 6.8x43mm Rem SPC firearm and has taken the lead on this project. While the cartridge is still technically under development (to be more correct would be to say “tweaked”), Barrett has teamed up with Peter Forras to work with Remington to optimize the weapon and cartridge. Forras has spent much time down at Remington working with them to perfect the 6.8x43mm cartridge.

The rifle has been based on the standard M16-platform. Barrett offers the rifle in both commercial and law enforcement/military configurations. The “bells and whistles” are the same for both versions, the only real difference is the use of selective fire, flash suppressors, bayonet lugs and telescopic stock on the law enforcement/military models.

The weapon as offered uses a mid-length gas system developed by Mark Westrom of ArmaLite, Inc. This mid length gas system changes the location of the gas port by placing it further forward than the carbine and slightly behind the rifle. This gives two major advantages: reliability and durability. By putting more distance between the bolt carrier and gas port, lower port pressures are created resulting in the bolt assembly’s velocity being slower. This increases reliability in extraction as well as extending the life of the bolt and some of the trigger components.

The barrel is manufactured by Fred Fedderson. This 1 turn in 10 inch twist barrel is chrome plated and is currently available in 16 inch length only. Barrett has plans on offering 12 and 20 inch barrels in the near future. The commercial version has a muzzle check similar to the one used by ArmaLite, Inc. The law enforcement/military versions use the standard M16-style muzzle break/compensator

The M648 gas block utilizes a folding front sight assembly. This assembly was designed by Barrett. On the law enforcement/military version, there is a threaded collet on the edge of the gas bock to install the silencer.

The Mid-Length SIR System

The A.R.M.S. Inc. SIR (Selective Integrated Rail) system developed by Richard Swan is the solution for many problems associated with military use of this type of weapon system. The SIR system is a free-floating handguard assembly that attaches to the carrying handle by a sleeve that goes on top of the rail (thus protecting it) as well as directly to the barrel nut. This give an extended top rail that runs the entire length of the upper receiver to the front sight assembly. There are four Mil-Std 1913 rails that enable optics, laser, flashlights and whatever other accessories that may be needed for the rifle with no effect on the barrel and its performance.

Free floating a military weapon has many benefits. First would be accuracy. With nothing impeding on the harmonics of the barrel, better uniform accuracy is achieved. Additionally, the barrel remains cooler as there is significantly better air circulation enabling the weapon to fire longer on full automatic fire. Another benefit, particularly with a hot barrel, pulling down on a vertical fore grip will not cause the barrel to bend or droop. The SIR system may also have a M203 grenade launcher attached to it. All the current models of the M648 feature the A.R.M.S. Inc. SIR system as well as the ARMS #40 L emergency flip-up backup sight.

The Bolt

The bolt carrier is standard M16/AR-15. The difference lies in the bolt itself. The bolt was designed by Chris Barrett and is manufactured by Lewis Machine & Tool (LMT). The bolt uses the trademark dual extractor spring “lobster tail” extractor manufactured by LMT as it is more durable and reliable. The bolt has other similarities to the LMT Enhanced bolt but Barrett made some changes in materials and specifications specifically for the M648. The bolt has a nickel plating on it.

Configurations

The M648 comes as a full weapon with fixed rifle stock as well as selective fire carbine lower receiver with the telescopic buttstock. The system is also sold as an upgrade or a conversion kit which will include the entire upper receiver assembly and magazine. The conversions can be obtained with either selective fire bolt carriers or semiautomatic only. It should be noted that when putting a conversion on a standard selective fire carbine lower receiver, the “H” buffer should be used. This is the buffer with two steel weights and one tungsten. If the standard three steel weight buffer is used the carbine may experience bolt carrier bounce resulting in light strikes on full automatic. This is not an issue with the full length rifle selective fire lower receiver. Semiautomatic guns can use either due to the bolt group will have sufficient time to lock before the next shot is fired. There has been some discussion about Barrett eventually coming out with a piston driven mechanism for this weapon system.

Shooting Impressions

The rifle received for testing was a law enforcement/military upper receiver with a standard semiautomatic only lower receiver. The author’s own Colt M4 full automatic carbine lower was used for full automatic testing. The semi-automatic only lower receiver was equipped with an LMT two-stage match grade trigger. The optics used were the M68 Aim Point Comp II, EOTech holographic sight as well as the standard backup sights. Approximately 700 rounds were fired in total in both semiautomatic for accuracy as well as fully automatic for functionality. The magazine used was a PRI made 28-round steel magazine. The ammunition was manufactured by Remington.

Fully-automatic tests were conducted in close quarter battle conditions. Targets ranged from 5 to 25 meters. The cyclic rate was about the same as the standard M4 carbine and recoil was really not that much more. There was no problem controlling the weapon. The EOTech sight made shooting easier allowing both eyes to remain open increasing speed and accuracy. By adjusting the brightness of the sight, it was useful for both close tactical work as well as short range sniping.

Conclusions

The 6.8mm Rem SPC is without a doubt an improvement over the existing 5.56x45mm for military use. But the question is, how much better? The cartridge unfortunately has a very steep uphill battle ahead of it once the military community gets a hold of it. The weapon itself is not an issue. The M16-based design is well proven. But in order for SOCOM in particular to adopt such a cartridge for use will be a gigantic undertaking. First and foremost it has to be more than better, it will have to be drastically better and offer a large advantage. Second, and perhaps the most critical, will be logistics. The cartridge will be at best used by SOCOM operators and them alone. From a logistical standpoint, adding a new cartridge into inventory, in particular one nobody else in the service uses, can cause serious problems. Once SOCOM operators are deployed they become part of the unit they are assigned and along with that goes their supply. Having non-compatible ammunition can put the operators at risk given they do not have re-supply specific to them.

The Barrett M648 and 6.8x43mm Rem SPC ammunition performed flawlessly and accurately. Barrett has not been too quick to go into production due to the fact they have waited until the development of the rifle and ammunition was completed insuring their customers get a final production weapon and not a semi-prototype. As of this writing, after more than three years of advertising and manufacturing of barrels to fire this new cartridge, the ammunition has yet to be completed and put into full production. This weapon and cartridge will undoubtedly find a following in law enforcement and commercial shooters and competitors. As far as the military use of this weapons system, only time will tell.