This one piece combat rail from Midwest Industries comes with everything you need for installation. It includes: Barrel Nut, Barrel Nut Wrench, Torque Plate, Picatinny Rail attachment, and Hex Keys. Feature: 4140 heat treated barrel nut Features patented 4140 heat treated torque plate Continuous MIL-STD 1913 Picatinny top rail Two integral anti-rotation QD sling sockets Seven sides of M-Lok Super slim Fully dehorned and deburred 100% made in USA keeps America working MI lifetime warranty