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The REC7 rifle's forged 7075 aluminum upper and lower receivers are Type 3 hardcoat anodized. The lower houses an ultra-dependable single-stage trigger. The upper supports a free-floated, hammer-forged, chrome-lined barrel with M4 feed ramps machined into the receiver and the barrel extension. A mil-spec A2 flash hider protects the muzzle. [3 ...
[b] [57] The M4 is a shorter and lighter variant of the M16A2 rifle, sharing much of the same operation mechanisms and has 80% parts commonality; the chief differences are a shorter barrel of 14.5 inches rather than 20 inches as well as a shortened receiver extension and buffer.
The Close Quarter Battle Receiver (CQBR) [5] is a replacement upper receiver for the M4A1 carbine developed by the US Navy.. The CQBR features a 10.3 in (262 mm) length barrel (similar to the Colt Commando short-barreled M16 variants of the past) which makes the weapon significantly more compact, thus making it easier to use in, and around, vehicles and in tight, confined spaces.
The M4 was developed from the Harrington & Richardson bolt-action M265 sporting rifle, adapted to a sheet metal frame with telescoping wire buttstock, a 14-inch detachable barrel chambered for .22 Hornet and the 4-shot detachable box magazine of the Savage Stevens M23D .22 Hornet sporting rifle.
Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Locking lug feed ramp on AR-15 barrel nut. A feed ramp is a basic feature of many breech loading cartridge firearm designs. It is a tightly machined and polished piece of metal which guides a cartridge from the top of the magazine into the firing chamber of the barrel.
The WLVRN is a multi caliber gas operated, conventional rotary bolt bullpup rifle. The gas system features a gas piston located above the barrel and a 6 position manual gas regulator The WLVRN is similar to the Desert Tech MDRx Rifle that it replaced when launched in January 2024. The WLVRN's specific improvements over the MDRx include a ...
Government-specified barrel profile increased to between 0.675 and 0.575 inches; A2: Also referred to as the "government" or "gov't" profile. Barrel profile for which the portion of the barrel in front of handguards is thickened to 0.715 inches; HBAR: A barrel that in some portion is thicker than government-profile, usually underneath the ...
A patented AR-15-pattern is produced with a bolt design featuring a redesigned extractor intended to improve the extraction of cartridges under adverse conditions. The company also produces a redesigned bolt carrier intended to improve the reliable performance of the rifle's “internal piston” system by obtaining a similar timing sequence with 14.5-inch carbine-length barrels compared to 20 ...