The SureFire X300 weapons light fits both handguns and long guns and generates 170 lumens of white light focused by a Total Internal Reflection (TIR) lens. Features include a rail-lock system with adapters for attachment and detachment on Universal and Picatinny rails. An ambidextrous push/toggle switch provides one-finger operation for either momentary or constant-on operation. Optional pistol grip switches are available. The light is constructed of aerospace aluminum and features an O-ring and gasket so it is submersible to 22 meters. Powered by two lithium CR123A batteries.