CMMG Barrel Sub-Assembly .300 Blackout 8 AR-15 4140 Chrome Moly Steel Black Nitride Pistol Length Medium Taper Profile
Buy your CMMG Barrel Sub Assembly parts from BattleHawk Armory today!Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly head spaced.
