Crimson Trace CMR-206 Rail Master Universal Laser with Instant Activation and Quick Installation for Pic Rail Mounts, Shooting, Competition and Range , Black

Brightness: Features A 5Mw Peak, 515-532Nm, Class 3R Visible Green Laser - The Brightest Beam Allowed By Law Ease Of Use: Instant Activation Ambidextrous Tap-On / Tap-Off Controls For Immediate Laser Activation From Either Side Of The Unit Runtime: Over 2 Hours Of Battery Life Powered By (1) 1/3N Battery (Included) Reliable: User Installed- No Gunsmithing Required - Factory Sighted At 50 Feet, But Is Fully User Adjustable For Windage And Elevation With Provided Tool VERSATILITY: Can be used on most pistols, rifles, and shotguns with M1913 Picatinny or similar accessory rail & 1-1/16" between the recoil lug and the trigger guard