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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 .277 Fury or 6.8×51mm Common Cartridge, [4] [5] (designated as the .277 SIG Fury by SAAMI [1]) is a centerfire rimless bottlenecked rifle cartridge announced by SIG Sauer in late 2019. [2] Its hybrid three-piece cartridge case has a steel case head and brass body connected by an aluminum locking washer to support the high chamber pressure ...
6.8 SPC (.277), Proprietary. Developed as an all new cartridge in the hopes of gaining a military contract. Rim diameter is 0.421" 300 AAC Blackout, Uses military 5.56x45 (also .223). The shoulder is reformed, length is trimmed, neck is sized to .308. This caliber is very popular, and examples are available in a wide variety of styles.
The 277 WLV provides medium bore (.277") performance that exceeds the parent 5.56×45 cartridge and also the .300 BLK, while approaching the power of the larger military 6.8 SPC which requires larger cases and dedicated components (e.g., bolt and magazines). Per an interview with the cartridge's designer: "I liked the performance of the 6.8 SPC ...
The designation of M468 stands for an M4 carbine chambered for the 6.8mm SPC cartridge. It was an attempt to create an optimal Special Operations close-to-medium range carbine for Close Quarter Battle (CQB). A 12-inch barreled micro-carbine and 16-inch barreled carbine version were created. Barrett ceased manufacturing the rifle in 2010. [4]
6.8mm Remington SPC: 2003 US 5 [4] [7 ... No CIP or SAAMI specs found. .17 HM2: ... Straight-walled cartridge based on a blown-out .30-30 Winchester case and designed ...
Specifications; Cartridge: 5.56×45mm NATO 6.8mm Remington SPC: Action: ... but is semi-automatic and also chambered in 5.56mm and 6.8mm Remington SPC. [12] M6A3
It is an M4 carbine utilizing a short-stroke gas piston system and is available in either 5.56×45mm NATO or 6.8mm Remington SPC. The REC7 is Barrett's second AR-pattern rifle chambered for the 6.8mm Remington SPC cartridge, the first being the Barrett M468 rifle. The 6.8 SPC-chambered M468 rifle employed the same Stoner expanding gas system as ...