Manufacturer: RRA Rock River Arms
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Rock River Arm 6.8 SPC Complete Midlength A4 Upper RRA BCG, Charging Handle Included (LAR-6.8)
NO FFL REQUIRED, ships to your door.
6.8SPC was developed for better terminal effects while still having an acceptable long range trajectory. The point of 6.8SPC is: significantly better terminal ballistics against humans and animals to 300 yards and still fit and run reliably in the AR15/M16/M4 platform. The parent case is .30 Remington, shortened to fit the AR15 magazine OAL. This is slightly larger in diameter than .223, so a new bolt is required (included in this complete upper). Magazine capacity is slightly reduced vs. 5.56 in the proper mags.
Renowned for their quality, Rock River Arms (RRA) has won many military and agency contracts. RRA was selected by the DEA to provide their LAR-15 carbines after winning one of the most demanding stress test competitions in history. Now you can add the hard hitting 6.8 Special Purpose Cartridge (SPC) caliber to your existing AR-15 with the purchase of this (NON-FFL REQUIRED) upper and a 6.8 magazine (see our Magazine section). No modifications required!
Guns Magazine, October 2004: "Rock River's DEA Carbine" Article
The following article is the best history of 6.8 SPC to date: The 6.8 SPC, Is it all that? Shotgun News 60(21):4-16. July 31, 2006
External Ballistics, Basics
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