CMMG 12.5" 223 Rem Multi Role Barrel Sub Assembly, Salt Bath Nitride - 55DDF0A

Barrel sub-assembly designed for custom AR-15 upper receiver builds, chambered in 5.56x45 NATO/223 Rem with a 12.5" multi-role profile barrel. Features 4140 chrome moly construction with salt bath nitride finish, 1:7 twist rate, carbine-length gas port, and comes pre-installed with M4 barrel extension and properly headspaced. Threaded 1/2x28 for muzzle devices.