RA-6ARC-CU-BRN-18

Rise Armament Complete Upper6MM ARC18″ Stainless Steel Barrel1:7 Twist1/2×28 ThreadedRifle Length Gas System15.25″ Free Float M-LOK HandguardBlack Nitride Bolt Carrier GroupAmbidextrous Charging HandleCerakote FinishPatriot BrownFeatures:Forged Billet Aluminum Receiver6mm ARC18 1:7…