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The M16 is a lightweight, 5.56 mm, air-cooled, gas-operated, magazine-fed assault rifle, with a rotating bolt. The M16's receivers are made of 7075 aluminum alloy, its barrel, bolt, and bolt carrier of steel, and its handguards, pistol grip, and buttstock of plastics.
Colt Carbine (AR-15A2 Government Carbine) (Special export model with receiver block and large pin upper receiver) 3rd Generation Short Ribbed S-1 A2 Yes Yes 5.56 NATO 16 in. A1 1:7 Yes/No A2 R6530 Sporter Lightweight .223 3rd Generation Short Ribbed S-1 A2 Yes Yes 5.56 NATO 16 in. A1 1:7 No A2 R6550 AR-15A2 Government A2 Ribbed S-1 A2 Yes Yes
Unlike possible replacements for the M16/M4 such as the now canceled XM8, the REC7 is not an entirely new rifle, instead it is made up of an upper receiver that is attached to an M16/M4 lower receiver and is compatible with many accessories intended for the M16/M4 family. It can also be mated to M16/M4 lower receivers currently in the ...
The only two known versions of the Model 605 prototypes used a modified lower receiver assembly that appears to use an early M16 Model 603 type forging without the "fence" surrounding the magazine release button. The modified lower receiver incorporated a four-position selector switch (developed by Foster Sturtevant in December 1966) so that a ...
The AR-57 PDW upper is a new design on AR-15/M16 rifles, blending the AR-15/M16 lower with a lightweight, monolithic upper receiver system chambered in 5.7×28mm. This model is also sold as a complete rifle, supplied with two 50-round P90 magazines. [1]
The lower receiver will also accept older mil-spec M16 or M16 upper receivers with an adapter. Receivers will be available that accept 5.56×45mm NATO rounds, 6.8×43mm Remington SPC rounds, 7.62×39mm rounds, and 7.62×51mm NATO rounds. Each upper receiver has its own rail system, which allows scopes, or other optics to be pre-sighted for each ...
The lower receiver is a standard M16 select fire unit. M16Ks are quite rare and very collectible. [citation needed] The later M16K-45 variant was produced using proprietary upper and lower receivers designed by Timothy F. La France specifically for the .45 ACP round. Both are forgings.
The Colt Automatic Rifle or Colt Light Machine Gun is a 5.56 mm NATO, open-bolt, full-automatic-only firearm developed by Colt Defense.It is based on the M16A2/A4, and has a distinctive squared-off handguard, vertical grip, carrying handle and integrated bipod.