*WILL Work with Bayonet Lug Models and NON-Bayonet Lug Models* Features: Installs on factory barrel nut, not included with handguard Features a monolithic type continuous top rail. Features five anti rotation QD sockets for push button swivels Light weight with extremely solid lock up. Constructed from 6061 aluminum hard coat anodized Extends past the front sight tower for additional space for mounting accessories. Overall length of top rail 7.25" width 1.840" height 2.17" Weight: 8.3oz. Five slot M-LOK compatible rail piece included. 100 percent made in USA