Bravo Companys BCM GUNFIGHTER Stock Assembly Mod 1 SOPMOD is the strongest light-weight polymer stock available for your mil-spec receiver extension. This stock features a Snag free Design with no sharp edges prevents tangling of the rifle with the shooters sling, molle gear, or other kit. Storage compartment located in the toe of the stock, accessible through butt pad. Includes a Mil-Spec receiver extension, buffer, buffer spring, end plate and castle nut lock ring.