However, currently, they provide receivers with both grey and black hardcoat anodized finish for building reproductions of the original XM16E1.  Lack of proper lubrication is the most common source of weapon stoppages or jams. The NATO Accessory Rail STANAG 4694, or Picatinny rail STANAG 2324, or a "Tactical Rail" is a bracket used on M16 type rifles to provide a standardized mounting platform.  Initial comments by Springfield Armory test staff were favorable, and some testers commented that the AR-10 was the best lightweight automatic rifle ever tested by the Armory.  Due to its design and lower muzzle velocity (about 3110 ft/s) the Belgian SS109 round is considered more humane because it is less likely to fragment than the U.S. M193 round. The XM4 (Colt Model 720) started its trials in 1984, with a barrel of 14.5 inches (370 mm). As a result, it became the target of a Congressional investigation. Since the "retro AR" scene had exploded in the last few years, many AR manufacturers, dealers and merchants have found a niche in this market. The forging process makes the strongest aluminum form, which is very suitable for a heavy-duty M16 that you plan to use often. .  that they developed a 7.62 NATO M80A1 EPR variant. ", "Evolution of the M855A1 Enhanced Performance Round", "The current readiness of the U.S. forces: hearing before the Subcommittee on Readiness and Management Support of the Committee on Armed Services, United States Senate, One Hundred Eleventh Congress, second session, April 14, 2010", "New M855A1 Enhanced Performance Round smashing expectations", "Army Speeding M855A1 EPR Adoption, 7.62 NATO Variant in the Works", "Taking a Look Inside the Army's DEVASTATING New M80A1 7.62mm Round", "Feeding the Modern Semi-Automatic Rifle", "SureFire "Quad-Stack" AR Rifle Magazines: SureFire 60-Shot and 100-Shot AR (AR-15/M16) 5.56mm NATO Box Magazines for Significantly-Increased Firepower during Infantry Combat and Tactical Engagements of All Sorts: Meet the SureFire MAG5-60 and MAG5-100 High Capacity Magazines (HCMs)"Quad-Stack" AR Rifle Magazines: 60-Round/Shot and 100-Round/Shot AR (AR-15/M16) 5.56mm NATO Box Magazines for Significantly-Increased Firepower during Infantry Combat and Tactical Engagements of All Sorts", "Lancer Systems L5 Translucent Polymer 30-Round Magazine for Tactical ARs]", "Heckler Koch HK416 Enhanced Carbine 556x45mm NATO", "Improved magazine increases weapons reliability", "First Look – New US Army 30 Round Enhanced Performance Magazine for M4A1", "The 5.56 X 45mm Timeline: A Chronology of Development", "Sgt. Otherwise it is externally identical to the M16A2. In January 1963, Secretary McNamara received reports that M14 production was insufficient to meet the needs of the armed forces and ordered a halt to M14 production. Springfield Armory's T44E4 and heavier T44E5 were essentially updated versions of the M1 chambered for the new 7.62 mm round, while Fabrique Nationale submitted their FN FAL as the T48. $69.00. The M16 and 5.56×45mm cartridge was tested and approved with the use of a DuPont IMR8208M. Mil-Spec M16 Lower Receiver: Description: Mil-Spec M16 Lower Receiver: Supplier part number: M16LR : Configure & Download; Rating & Comments (5) Tags (8) Alternate Versions . The heavier bullet had more energy, and was made with a steel core to penetrate Soviet body armor.  The M16's action works by passing high pressure propellant gasses tapped from the barrel down a tube and into the carrier group within the upper receiver, and is commonly referred to as a "direct impingement gas system". The weapon was cleared and resumed firing with the next chambered round. M16 … It is based on the M16, and was originally conceived as an improvement based on the Colt M4 carbine family issued to the U.S. military, with the notable inclusion of an HK-proprietary short-stroke gas piston system derived from the Heckler & Koch G36. You'll often hear people refer to A1, A2, A3, or A4, but it means they are actually related to the different generations of the M16 rifle. The M16A3 is a modified version of the M16A2 adopted in small numbers by the U.S. Navy SEAL, Seabee, and Security units. However, this caused less fragmentation on impact and reduced effects against targets without armor, both of which lessened kinetic energy transfer and wounding ability. In addition to the than new STANAG 4172 5.56×45mm NATO chambering and its accompanying rifling, the barrel was made with a greater thickness in front of the front sight post, to resist bending in the field and to allow a longer period of sustained fire without overheating. Officially adopted as a replacement for the M3 "Grease Gun" (and the Beretta M9 and M16A2 for select troops) in 1994, it was used with great success in the Balkans and in more recent conflicts, including the Afghanistan and Iraq theaters. , The M16's most distinctive ergonomic feature is the carrying handle and rear sight assembly on top of the receiver. Sights. Although this Brownells A1 retro lower is clone correct, some builders complain that it’s not as snug of a fit to the other manufacturers upper as it should be. 7.18 lb / 3.26 kg – unloaded; 8.79 lb / 3.99 kg – loaded. Only one soldier reported a jam when his M16 was covered in mud after climbing out of a canal. AR15 or M16? AR15/M16 FAQs: Bushmaster Armpistol: M96 Expeditionary: ANM2: HAC-7 .  In late 1963, the Defense Department began mass procurement of rifles for the Air Force and special Army units.  This culminated in the development of the 7.62×51mm NATO cartridge.. By 1989, the Air Force started to replace the earlier barrels with 1/7 rifled models for use with the M855-round.  The newer steel magazines are about 0.5-inch longer and four ounces heavier. , The threaded barrel allows sound suppressors with the same thread pattern to be installed directly to the barrel; however this can result in complications such as being unable to remove the suppressor from the barrel due to repeated firing on full auto or three-round burst. This "partial fence" reinforcement is placed above the magazine release and just below the ejection port cover. In Praise of the M16 Rifle. This was shown to make the light .223 Remington bullet yaw in flight at long ranges and it was soon replaced.  "Most men armed with the M16 in Vietnam rated this rifle's performance high, however, many men entertained some misgivings about the M16's reliability. , Production of the 30-round magazine started late 1967 but did not fully replace the 20-round magazine until the mid-1970s. These weapons were equipped with a triangular charging handle and a bolt hold open device that lacked a raised lower engagement surface. After a few minor modifications, the weapon gained in popularity among troops on the battlefield.  With good shot placement to the head and chest, the target was usually defeated without issue. In October 1980, shortly after NATO accepted the 5.56×45mm NATO rifle cartridge. In short a word, the AR-15 is a line of self-loading weapons for regular civilian and sporting use. That's an interesting lower if you read the specs. The U.S. Army concluded that three-shot groups provide an optimum combination of ammunition conservation, accuracy, and firepower. Only troops who had fired their weapons at enemy targets were allowed to participate.  The M16 uses an L-type flip, aperture rear sight and it is adjustable with two settings: 0 to 300 meters and 300 to 400 meters. From an aesthetic point of view the lower engraved with distinctive Aero insignia doesn't take away from the authenticity of your build rifle, but some owners complain that they got poorly executed roll marks as it is pretty light, actually much lighter than on the Aero M4A1 lowers. While there, they questioned around 100 infantry troops about the reliability of their M16 rifles, as well as the M4 carbine. The M4 carbine has a three-round burst firing mode, while the M4A1 carbine has a fully automatic firing mode. Search for Mil Spec Complete Lower Receiver And New Vfc M16 Lower Receiver Ads Immediately . Developed to increase the effective range of soldiers in the designated marksman role, the U.S. Navy developed the Mark 12 Special Purpose Rifle (SPR). All the parts you need to build an M16 lower receiver will be included in a complete parts kit, as listed above. Made in USA Complete as an A2 lower or use as a. According to currently adopted terminology, under the M16 term it is considered a select fire rifle and with an AR-15 name people usually recognize rifle with semi-automatic fire only.  The M4's 14.5" barrel length reduces muzzle velocity to about 2900 ft/s. The heavier bullet reduces muzzle velocity from 3,200 feet per second (980 m/s), to about 3,050 feet per second (930 m/s). Still in service today, the M16 is being phased out by the M4 carbine. The infantry's normal M16s are too long for use in a "buttoned up" fighting vehicle, so the FPW was developed to provide a suitable weapon for this role. Secretary McNamara designated the Army as the procurer for the weapon with the Department, which allowed the Army ordnance establishment to modify the weapon as they wished. Like one proverb says, "A little surplus never hurt anyone". In March 1965, the Army began to issue the XM16E1 to infantry units. The current U.S. Army and Air Force issue M4 Carbine comes with the M68 Close Combat Optic and Back-up Iron Sight. Since the process is so time-consuming, billet lowers tend to be more expensive than a comparable forged option. (Although many .22 caliber conversion kits are made for the AR-15, the rimfire versions are only cosmetic similar rifles.).  The USMC has retired the M16A2 in favor of the newer M16A4; a few M16A2s remain in service with the U.S. Army Reserve and National Guard, Air Force, Navy and Coast Guard.  In early 1963, the U.S. Special Forces asked, and was given permission, to make the AR-15 its standard weapon. Technical Specs. McNamara ordered its adoption, despite receiving reports of several deficiencies, most notably the lack of a chrome-plated chamber.. On the flipside, these rugged and good-looking lowers are inherently weaker than forged receivers are. The M16A1 was the finalized production model in 1967 and was produced until 1982. Intensive training programs in weapons cleaning were instituted including a comic book-style operations manual. Meanwhile, the Army relented and recommended the adoption of the M16 for jungle warfare operations. The large wounds observed by soldiers in Vietnam were actually caused by bullet fragmentation created by a combination of the bullet's velocity and construction. A notch for the middle finger was added to the pistol grip, as well as more texture to enhance the grip. In Stock. In the 1970s, Singapore was looking for an assault rifle for the Singapore Armed Forces and chose both the M16 and ArmaLite AR-15.  However, any pointed lead core bullet will "tumble" after penetration in flesh, because the center of gravity is towards the rear of the bullet. This is a Receiver Made by NoDak Spud (NDS), The Fit Isn’t so Tight With Some Upper Receivers, A Solid Lower for the Original XM16E1 Rifle at a Budget Price, Completely Stripped Reproduction of an A1 Receiver, Machined by Brownells to the Same Spec as the Company's Full-Price Options, You may Encounter a Large Wiggle Between the Lower and Upper Receivers, These Blem Lowers may have the Safety Markings on Both Sides of the Lower, Three Position Color-Coded Bullet Selector, It Has Low Shelf Making it RDIAS Compatible, MIL-A-8625F Type III Class 2 Hard Coat Anodized Finish, Mil-Spec Buffer Tube With ST-T2 Tungsten Heavy Buffer, It Has Safe, Semi, Auto Selector Markings, Features Markings “Property of USA” and “Cal. It also possessed a combination flash hider/sound moderator to reduce problems with muzzle flash and loud report. A NATO standardization effort soon started and tests of various rounds were carried out starting in 1977. Instead of Colt or FN logo, this stripped lower receiver features a fancy Aero Precision insignia. The thicker barrel is more resistant to damage when handled roughly and is also slower to overheat during sustained fire. The M16A2 weighs 8.8 lb (4.0 kg) loaded with a 30-round magazine, because of the adoption of a thicker barrel profile. , The original M16 fared poorly in the jungles of Vietnam and was infamous for reliability problems in the harsh environment. Billet aluminum lowers are machined and milled from a solid block of pure aluminum on CNC machines. Obviously, the fully completed lower assembly will help you avoid making any costly mistakes. Document. 5.56mm”, Machined From High Strength, 7075-T6 Forged Aluminum, This Stripped Lower Receiver is the Perfect Base for an M16A4 Clone, You May Encounter Light Roll Marks on Your Lower, Brownells - AR-15 Blemished Xm16e1 Lower Receiver, Spikes Tactical - AR-15 Complete M4 Lower Receiver, Aero Precision - Special Edition M16A4 Stripped Lower Receiver, M16 lowers assemblies and lower receiver part kits, M-16 (trigger, disconnector/sear, hammer and fire selector), Best Marlin 795 Stocks of 2020 – Complete Buyer’s Guide, Best M16 Bolt Carriers Groups – 2020 Top Picks. Tactical Life. Weight (without magazine and sling) 6.35 pounds. The original M16 rifle was a 5.56mm automatic rifle with a 20-round magazine. One note: you can also come across the term 7071-T6 aluminum in gun literature, but there is no such thing as 7071 aluminum, and that will tell you more about that “gun writer's” competence. A new adjustable rear sight was added, allowing the rear sight to be dialed in for specific range settings between 300 and 800 meters to take full advantage of the ballistic characteristics of the new SS109 rounds and to allow windage adjustments without the need of a tool or cartridge. This second type lower also known as the "Partial Fence" type receiver has, unlike the first "Slabside" type, the captive pivot pins, which were held in place by a detent housed on the added reinforcement rib. MILSPEC Document for M16 Variants .  As such, it is made of pressed/stamped aluminum and was not designed to be durable. While on the outside, the M-16 and the AR-15 appear almost identical, the military fully-automatic M16s are internally different from semi-automatic AR-15s.  The 5.56 mm round had to penetrate a standard U.S. helmet at 500 yards (460 meters) and retain a velocity in excess of the speed of sound, while matching or exceeding the wounding ability of the .30 Carbine cartridge.  However, the M16 rifle's reputation continues to suffer. It is equipped with a removable carrying handle and Picatinny rail for mounting optics and other ancillary devices. Usually, cast receivers are not recommended don't have the strength or durability to stand up to the abuse of more severe patrol work or match shooting. The first confrontations between the AK-47 and the M14 came in the early part of the Vietnam War. The performance gains have not added weight or cost to the magazines.  Adopted in July 1997, the M16A4 is the fourth generation of the M16 series. Actually, we are talking about five major parts of the fire control group from the M-16 (trigger, disconnector/sear, hammer and fire selector) that are not interoperable in AR-15 because they are modified like a hammer and trigger assembly or disconnector, or simply an AR-15 misses certain parts like an auto sear.  The AR-10 featured an innovative straight-line barrel/stock design, forged aluminum alloy receivers and with phenolic composite stocks. Each kit is guaranteed to fit your mil-spec dimension M16 lower receiver. , In July 1960, General Curtis LeMay was impressed by a demonstration of the ArmaLite AR-15. The Brownells BRN-16A1 stripped lower receivers come from the NoDak Spud (NDS) milling shop where they start as a 7075 T6 aluminum forging. MSRP: $69.00 $49.00. Bravo Company Ar 15 M16 Complete Lower Receiver W Milspec M4 Stock Complete Lower W Mil Spec M4 Stock is best in online store. Although you don’t need to be particularly mechanically inclined to put together your own rifle with custom AR-15 parts, building the 80% lowers are not for the faint of heart. M16. M16 Lower Receiver Specs And Composite Ar Lower Receiver get reduced The easiest way to look at it is this: Every M16 is an AR15, but not all AR15s are an M16.  The SS109 round was based on the U.S. cartridge but included a new stronger, heavier, 62 grain bullet design, with better long range performance and improved penetration (specifically, to consistently penetrate the side of a steel helmet at 600 meters).  As the line of sight is 2.5 in (63.5 mm) over the bore, the M16 has an inherent parallax problem. Historical reenactments and the increased interest of collectors for Vietnam War spawned offerings of the early AR-15 and M16A1 rifles as well as the parts kits for builders. The variants were issued in limited numbers to special forces, helicopter crews, Air Force pilots, Air Force Security Police Military Working Dog (MWD) handlers, officers, radio operators, artillerymen, and troops other than front line riflemen.  Standard USGI aluminum 30-round M16 magazines weigh 0.24 lb (0.11 kg) empty and are 7.1 inches (18 cm) long. Furthermore, the Marine Chief Warrant Officer responsible for weapons training and performance of the Third Battalion, Sixth Marines, reported that "We've had nil in the way of problems; we've had no issues", with his battalion's 350 M16s and 700 M4s.. ... nor would I recommend having a M16 Lower parts kit on hand unless you are actually an FFL. These 22 mm grenade types range from anti-tank rounds to simple finned tubes with a fragmentation hand grenade attached to the end. Variant. The weapon that eventually became the M16 series was basically a scaled down AR-10 with an ambidextrous charging handle located within the carrying handle, a narrower front sight "A" frame, and no flash suppressor.. This is the AR15 / M16 Size. Bolt carriers were originally chrome plated and slick-sided, lacking forward assist notches. LOWER RECIEVERS and LOWER KITS . Like earlier M16s, it can be fired in either semi-automatic or automatic mode, instead of the burst function selected for the M16A2. This accumulating carbon and vaporized metal build-up within the receiver and bolt-carrier negatively affects reliability and necessitates more intensive maintenance on the part of the individual soldier. It is equipped with a removable carrying handle and a full length quad Picatinny rail for mounting optics and other ancillary devices. It was equipped with triangular handguards, butt stocks without a compartment for the storage of a cleaning kit, a three-pronged flash suppressor, full auto, and no forward assist.  In 1969, the M16A1 replaced the M14 rifle to become the US military's standard service rifle. MIL SPEC Bolt Carrier Group ... Sale. Length. This easily recognizable receiver replicates the exact contours of that "Partial Magazine Fence" configuration and offers the perfect unit for a Retro build of the first M16 rifles issued to the troops in Vietnam. Obviously, the M14 came in three processing methods: cast, billet and forged manufacturing methods rate slowly and... 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