For more than 20 years, Crimson Trace has been known for revolutionary innovation. The Rail Master® was our first universal laser sighting system, and it quickly took the market by storm. Rail Master laser sights and tactical lights are now among our top selling products for good reason. Rail Master units provide a universal fit for rail-attached pistols, rifles and shotguns with Picatinny 1913 accessory rails, are user-installed in moments, and feature instant "tap-on / tap-off" activation. Rail Master was, and continues to be, the industry benchmark for quality and affordable universal fit lasers or tactical lighting systems.