Barrel Sub-Assembly 308 Winchester - 12.5'''' Bbl Sub-Assy Mc 1-10 5/8-24'''' Black Nitride

Perfect for building your custom MK3 upper group. Comes with a properly installed barrel extension. All barrel sub-assemblies are properly headspaced. For .308 Winchester Rifles 12.5" Barrel Length Medium Taper Contour Mid-Length Gas System 1-10 Twist 5/8-24 Threads Salt Bath Nitride Finish Mfg: Cmmg