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