Rosco Manufacturing Bloodline AR-15 5.56 NATO 11.5" M4 Barrel - Nitride

The Rosco Manufacturing Bloodline 11.5" M4 Barrel is a standalone AR-15 barrel chambered in 5.56x45mm NATO. Its compact 11.5" length is intended for AR-pistol or short-barreled-rifle configurations, and the barrel is offered in New condition.

Rosco machines this Bloodline barrel from 4150 chrome-moly-vanadium steel with an M4 profile. The barrel and M4 barrel extension have a black nitride finish.

A 1:7 twist rate handles the rifling specification, while the carbine-length gas system uses a 0.750" gas-block journal. At the muzzle, 1/2x28 threads provide the standard interface for compatible 5.56 muzzle devices, and the bore terminates in an 11-degree crown.