22 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. The RISE 22 ARC AR-15 Upper Receivers features an exceptionally accurate 18-inch 416R stainless steel threaded barrel.
