This new AR15 by Bear Creek Arsenal in 300 ACC Blackout (7.62x35mm) comes with one 30 round HEX magazine, 4.5" heavy barrel, adjustable arm brace, and lifetime warranty from BCA. Insured shipping is $45.00 to the continental U.S. where allowed and no card fees added at Deals on Guns. BCA website; BC-15 | .300 Blackout Pistol | 4.5" Parkerized Heavy Barrel | 1:8 Twist | Micro Length Gas System | 4" MLOK