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The gun was designed to be a personal security detail pistol. The LWRC pistol accepts a 5.56 NATO cartridge. It has a 8.5 in (22 cm) barrel and weighs 5.9 lb (2.7 kg) pounds. The gun has the short-stroke gas piston system. The barrel has a 1:7 twist and is treated with Black Nitride. [2]
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 XM7, previously designated as the XM5, is the U.S. Army variant of the SIG MCX Spear, a 6.8×51mm (.277 in), gas-operated, magazine-fed assault rifle [1] designed by SIG Sauer for the Next Generation Squad Weapon program in 2022 to replace the M4 carbine.
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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 list of materials (L/M, LM, LoM), bill of materials (B/M, BM, BoM), or parts list (P/L, PL) is a (usually tabular) list of the materials used to make a part, and the parts used to make an assembly. It may contain instructions for heat treatment, finishing, and other processes, for each part number.
The final prototype featured an upper and lower receiver with the now-familiar hinge and takedown pins, and the charging handle was on top of the receiver placed inside of the carry handle. [38] For a 7.62 mm NATO rifle, the AR-10 was incredibly lightweight at only 6.85 lb (3.11 kg) empty. [ 42 ]
The standard trigger was exchanged for an adjustable set-trigger pack assembly with a 25 N (5.6 lb f) trigger pull and 12.5 N (2.8 lb f) in the set operation mode, the buttstock has a slightly adjustable auxiliary cheek riser, and the lengthened handguard has an integrated bipod.