The CMR-206 Rail Master is compact, yet powerful, universal green laser sight designed to fit rail-equipped pistols, rifles and shotguns. The laser sight fits onto virtually any firearm with a modern (M1913 Picatinny or Weaver-style) accessory rail. Crimson Trace offers the brightest green laser allowed by law, (5mW peak, 515nm, Class 3R). The Rail Master boasts 2 hours of (constant) run time on a single 1/3N Lithium battery and features a 5 minute auto shut-off for power conservation. The CMR-206 offers 3 modes of operation: Momentary, Strobe and Constant-On. The unit is quickly and easily user-installed in moments and can be transferred from firearm to firearm.