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The Monolithic Rail Platform (MRP) [3] was created by the company, a one-piece, Picatinny-topped AR-15-pattern upper receiver made from a forged aluminum block. [4] The MRP upper receiver has a quick-change barrel system. [5] Its top rail position matches M4 and E3-type weapons for optical and sight compatibility. [6]
The Ares Defense Shrike 5.56 is an air-cooled, dual-feed light machine gun/rifle for semi or full-auto configurations that fires the 5.56×45mm NATO cartridge. The Shrike 5.56 is sold as either as a complete weapon, or as an upper receiver "performance upgrade kit" to existing AR-15 and M16-type service rifles and carbines.
5.56 NATO 16 in. A1 1:7 Yes A2 R6521 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
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.
The C8 has a 368 mm (14.5 in) A1 profile barrel like the Colt Model 653 M16A1 carbine, but with a 1 in 178 mm (7 in) rifling twist appropriate for adequately stabilizing the 5.56×45mm NATO C77 cartridge L109 ball and the C78 cartridge longer L110 tracer projectiles and the design improvements featured on C7 assault rifles. The C8 has a cyclic ...
The AR-15 rifle usually comes chambered for either the military cartridge 5.56×45mm or the .223 Remington. Because of the pressures associated with the 5.56×45mm, it is not advisable to fire 5.56×45mm rounds in an AR-15 marked as .223 Remington, since this can result in damage to the rifle or injury to the shooter. [1]
A disassembled Mauser action showing a partially disassembled receiver and bolt. In firearms terminology and law, the firearm frame or receiver is the part of a firearm which integrates other components by providing housing for internal action components such as the hammer, bolt or breechblock, firing pin and extractor, and has threaded interfaces for externally attaching ("receiving ...
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 ...