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The 6.8mm Remington Special Purpose Cartridge (6.8 SPC, 6.8 SPC II or 6.8×43mm) is a rimless bottlenecked intermediate rifle cartridge that was developed by Remington Arms in collaboration with members of the U.S. Army Marksmanship Unit and United States Special Operations Command [6] to possibly replace the 5.56 NATO cartridge in short barreled rifles (SBR) and carbines.
The rebated rim dimensions exactly match the 6.8mm Remington SPC case, allowing the use of the 6.8mm SPC bolt-face of an AR-15, but the case has a base diameter of .4400" and cannot be reformed from any other existing case. The 400 LGND uses .4005" jacketed rifle bullets. 450 Bushmaster : Uses .284 Winchester cases. Cut the length to 1.700" to ...
The rifle uses a short-stroke gas piston mechanism, unlike the M16 or M4 which use Stoner bolt and carrier piston. In addition, the REC7 uses the new 6.8mm Remington SPC (6.8×43mm) cartridge, a round that is of roughly equivalent length to 5.56×45mm NATO ammunition, so it is compatible with a standard-size lower receiver currently in use by ...
The Remington ACR is a selective-fire modular rifle that is only available for the military and law enforcement market in 5.56×45mm NATO, 6.8mm Remington SPC, and 6.5mm Grendel. ACR – 14.5 in (368mm) barrel, 16.5 in (419mm) barrel [36] ACR-PDW – 8.25 in (210mm) barrel, 10.5 in (267mm) barrel [37]
6.8mm Remington SPC 7.62×39mm Italy: Yes 2008–present BSA 28P: Birmingham Small Arms Company.280 British United Kingdom: 1949 BSA Machine Carbine [9] [10] Birmingham Small Arms Company.30 Carbine United Kingdom: no 1945 BR18: ST Kinetics: 5.56×45mm 6.8mm Remington SPC 7.62×39mm Singapore: 2018–present Brügger & Thomet APC556: Brügger ...
Magpul created a larger variation of their PMAG magazine, called the "Black Widow," with a blood-red follower for the 6.8mm round. The upper and lower receivers were developed specifically to fit this Magpul magazine and optimized around the 6.8×43mm round. The flagship model of the Six8 series is the UCIW which features an 8.5-inch barrel.
The XCR was designed in 2004 by Alex J. Robinson of Robinson Armament Co. Production of the XCR-L variant of the rifle began in mid-2006. The XCR-L is currently available in 5.56×45mm NATO, 6.8mm Remington SPC and 7.62×39mm calibers. [9] Each of these calibers is available in kit form for converting an existing rifle to one of the other calibers.
It is the parent case for the 6.8mm Remington SPC, [1] which is in turn the parent case for the .224 Valkyrie. The .30 Remington, along with the 25 Remington, .32 Remington. and .35 Remington were created for use in the Remington Model 8 rifle, to compete against the .25-35 Winchester, .30-30 Winchester and .32 Winchester Special.