Rosco Manufacturing Bloodline AR-15 5.56 NATO 12.5" Barrel - Nitride

The Rosco Manufacturing Bloodline 12.5" M4 barrel is a replacement barrel for the AR-15 platform, chambered in 5.56x45mm NATO. Rosco positions this configuration for compact intermediate patrol builds that fall between short SBR or pistol setups and RECCE-style platforms.

This 12.5" Government-profile barrel is machined from 4150 chrome-moly-vanadium steel and weighs 21.79 oz. Its 1:7 twist rifling is paired with an 11-degree crown. The barrel and barrel extension have a black nitride finish, and the bore is electro-polished after salt-bath nitriding.

The barrel uses a carbine-length gas system with a .750" gas-block journal. Standard 1/2x28 muzzle threads provide the specified interface for a compatible muzzle device.

This barrel is offered in New Condition. The package includes one barrel.