Converts Your AR To A Hard-Hitting .30 Caliber Round With No Other Modifications
Direct replacement for the standard .223/5.56mm barrel converts your AR-15 to the high-performance 300 AAC Blackout (300BLK) cartridge. The 300 AAC lets you upgrade your rifle to 7.62 x 39 ballistics, while retaining the standard AR-15/M16 bolt, carrier, and magazine at its full capacity, with no additional modifications. 1-7" rifling accepts bullet weights from 110 gr to 220 gr, and 5/8"-24 muzzle threads accept popular AR-.308 flash suppressors and muzzle brakes. Two models available, both 16" long and treated inside and out with CMMG’s "Wasp" nitriding process for outstanding resistance to wear and corrosion. Carbine barrel has the gas port in the standard position for use with all M4-length gas systems and supersonic ammunition. Pistol barrel has the gas port positioned for use with pistol-length gas systems; recommended for use with unsuppressed subsonic ammo only.
AR-15, Issue:09, Page:016
Big Book Catalog, Issue:66, Page:016
SPECS: Hardened 4150 chrome-moly steel, Wasp nitride finish, matte black. 16" O.A.L. Carbine - .750" O.D. at gas port; Pistol - .936" O.D. at gas port. 1-7" twist rifling. 5/8"-24 tpi muzzle threads. Barrel extension included. Pistol gas system model recommended for use with unsuppressed subsonic ammunition only.