Bushmaster discusses it's most popular AR15 style rifle, the M4 Patrolman.
NEW! Bushmaster 6.8mm SPC Rifles
This gas operated semi-automatic packs a bigger punch than our 5.56mm/.223models – a .270 cal. 6.8mm SPC (Special Purpose Cartridge) specifically developed for the military, but now available commercially. Velocity averages a bit over 2600 FPS (with Hornady 115 Gr.V-Max), and the heavier bullet weights deliver excellent terminal energies. The 6.8 mm SPC was developed from a .30 Remington case which is shortened slightly to fit the AR15 type magazine. Due to the “fatter” case diameter, magazine capacity in a 30 Round AR type shell is reduced to 26 Rounds, and 6.8 specific springs and followers are used. The bolt is also different - due again to case diameter (take care not to interchange a 5.56mm/.223 bolt with a 6.8mm SPC bolt). http://www.bushmaster.com/catalog_xm15_BCWA3F-16M468.asp
- 6.8 mm SPC Caliber
- 16” M4 Profile Barrel with “Izzy” Brake
- Six Position Telescoping Stocks are fitted to rifles – other stocks are available as optional installations
- Rifles Include a Lockable Hard Case with Operator’s Safety Manual, 26 Round Magazine, Orange Safety Block and Black Web Sling
- One Year Bushmaster Warranty