The Combat M-Lok Handguard is constructed of 6061 aluminum with a continuous 1913 Picatinny top rail, two integral anti-rotation QD sling sockets and seven sides of M-Lok. It also utilizes a 4140 heat treated barrel nut, 4140 heat treated torque plate, and is fully dehorned and deburred. The handguard includes a barrel nut, wrench and 5-Slot polymer M-Lok rail. Made in USA.