Made of precision machined 6061 aircraft aluminum with premium anodizing. 8.85" free float handguard for AR15 .223 CAR/Mid Size. Provides 7 Weaver-Picatinny rails for lights, lasers, bipods, grips,and sights. Customizable four 7 slot and two 16 slot detachable rails and top 20 slot fixed rail. Net weight with all rails attached is 19.7oz. Innovative 45 degree side mounting base offers extra tactical options. Free float barrel nut is included.