Description
Rise Armament Complete Upper, 6MM ARC, 18″ Stainless Steel Barrel, 1:7 Twist, 1/2X28 Threaded, Rifle-Length Gas System, 15.25″ Free Float M-LOK Handguard, Black Nitride Bolt Carrier Group, Ambidextrous Charging Handle, Anodized Finish, Black RA-6ARC-CU-BLK-18
