One Horse OH-BR01 AR-15 5.56 NATO 16" M4 Barrel

The One Horse OH-BR01 is a standalone AR-15/M4-pattern rifle barrel chambered in 5.56x45mm NATO. It is intended for a new build, replacement, or upgrade using a standard compatible upper receiver.

This 16" barrel uses an M4 contour and a carbine-length gas configuration. Its 1:7 twist rate provides the rifling specification needed when selecting components for an AR-15 or M4-style upper assembly.

The barrel is made from steel and has a black nitride finish. This is a new barrel sold as an individual component, not a complete firearm or complete upper assembly.