CMMG 55DC70A Barrel Sub-Assembly 5.56 NATO 16.1" Black Nitride - 55DC70A

CMMG barrel sub-assembly designed for AR-15 platform builds, featuring a 16.1" midlength profile with 1:7 twist rate and medium taper. The 4140 chrome moly steel construction includes a salt bath nitride finish, pre-installed M4 barrel extension with 1/2-28 muzzle threads, and comes properly headspaced and ready to install into your upper receiver.