Rosco Manufacturing Bloodline AR-15 300 Blackout 10.5" 4150 CMV Barrel - Nitride

The Rosco Manufacturing Bloodline 10.5" AR-15 barrel is a heavy-profile replacement barrel chambered in 300 Blackout. Its compact configuration is suited to AR pistol and SBR builds, including setups intended for suppressed use.

Built from 4150 chrome-moly-vanadium steel, this barrel uses a pistol-length direct-gas system with a 0.750 in gas-block journal. Rosco sized the gas port for use with both subsonic and supersonic 300 Blackout ammunition in suppressed and unsuppressed configurations.

The 10.5 in barrel has a 1:7 twist, 5/8x24 muzzle threads, and an 11-degree crown. A black salt-bath nitride finish is applied to both the barrel and barrel extension for corrosion resistance. Barrel weight is 21.4 oz.