The UTG Pro AR15 15" Super Slim Free Float Keymond Handguard is free-floating with proprietary Barrel nut design. 112 Keymod compatible slots on 7 Keymod compatible slot tracks for mounting keymod compatible rails and accessories with diverse applications. Fits carbine, mid-length or rifle length AR15. Super lightweight with 37 slot extended top picatinny rail to form a continuous mounting platform with the receiver, includes 2 Keymod compatible picatinny rail sections, 4 slot and 8 Slot, for accessory options. Features integral anti-rotation tabs for alignment and locking with upper receiver. Ergonomic octagonal profile with 96 well placed grooves on rail surface for solid grip, air-accelerated heat release and comfort. Scalloped top picatinny rail edges for no-snag mounting. Precision machined from 6061-T6 aircraft grade aluminum with hard black anodizing. Designed to fit with standard gas tube and barrel diameter not exceeding 1", not compatible with piston system, re-designed or over-sized upper receivers. Made in USA.