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. Ambidextrous control tabs allow the user to instantly activate or deactivate the laser. The human eye processes the color green more effectively than any other color, and Crimson Trace offers the brightest green laser allowed by law, (5mW peak, 515nm, Class 3R). The CMR-206 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 unit is quickly and easily user-installed in moments and can be painlessly transferred from firearm to firearm. The CMR-206 is securely fastened using Crimson Trace’s Secure Lock Technology (SLTT). Fits pistols, rifles, and shotguns with M1913 Picatinny or Weaver-style Accessory Rail. Including (but not limited to). With a minimum of 1 1/16 from recoil lug. Rail-Equipped Pistols and Rifles: Fits pistols, rifles, and shotguns with M1913 Picatinny or Weaver-style Accessory Rail including (but not limited to). ATI Firepower Xtreme Thunderbolt 1911. Buck Mark Black Lite. Buck Mark Black Label Carbon Fiber. Buck Mark Black Label Carbon Fiber Pink. Thunder 9 Ultra Compact Pro. Thunder 40 Ultra Compact Pro. Thunder 45 Ultra Compact Pro. 92 Compact with Rail. Colt Combat Unit Rail Gun. CZ 75 SP-01 Tactical. DW “Elite Series” Titan, Mayhem, Chaos. Gold Combat RL II LES BAER. Baer 1911 Ultimate Recon Pistol. P22 (Gen2 w/multiple rail notches only). Most other rail-equipped pistols with a minimum of 1 1/16 in from recoil lug.