BCM BCMGunfighter Mod 0 Kit is a black polymer buttstock kit with a SOPMOD widebody cheekweld for AR-15 platform rifles, featuring a snag-free design with no sharp edges to prevent sling/MOLLE gear tangling. Includes a modular VBOST (Vehicle Borne Operations Sling Tab) for securing the sling against the stock, two ambidextrous sling mounting options including QD swivel sockets, and a modular 5-part, 1-screw design. Kit includes a BCM 7075-T6 mil-spec receiver extension, M4 locking nut, mil-spec carbine action spring, carbine buffer, and BCM QD swivel mount end plate. Safety note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.