NC STAR’s 45 degree angled off-set rail mount is used for mounting aftermarket accessories such as lights, lasers, back-up iron sights, and more from a standard picatinny/weaver RIS system. This rail mount is made from durable, lightweight (1.4 oz) aluminum and measures 1.8″ in length. It can be easily added or removed by a secure hand-tightened thumb screw.