Steel barrel nut wrench is specifically designed for installing or removing URX II, URX III, and URX 3.1 barrel nuts. Fits torque wrench with ½” drive (not included). Recommended installation torque spec is 45-55 ft.-lbs.
Knights Armament Company Tool, Barrel Nut Wrench, For Urxii/iii/3.1 Rails, Black 20495