Add this spare mount to additional guns to allow a single Brass Cather to be quickly moved from gun to gun quickly and easily. Includes spare mount and fastener.p Item Weight: 0.8 ouncesbr Item model number: 123904br Mounts to any rifle with a flat top or picatinny rail hand guardp Fully adjustable, mounts virtually anywhere on a pic rail, riser of to rear of hand guard with pic rail.