Crimson Trace's Rail Master is an universal laser sighting system, and has quickly took the market by storm. Each unit provides a universal fit for rail-attached pistols, rifles and shotguns with Picatinny 1913 accessory rails. It features instant "tap-on/tap-off" activation. This model has 420/110 Lumen LED white light, Cree XPL LED bulb and waterproof aluminum body with black finish.