The LG-210 fits the Ruger Blackhawk and Single-Six And Vaquero single action revolvers. (except pre 73 , 3-screw models) A Tool for the New Rules of Survival Unsurpassed quality and comfort The Ultimate Self-Defense Solution No Squirrel or Pop Can is Safe Put your Ruger Right on the Mark. For the Action Shooting enthusiast Cowboy-action shooters, hunters and plinkers, you laser sight is here. Adding a laser to this classic revolver allows you to practice point-shooting, improve your accuracy, ensure clean kills on game, or just have more fun shooting. The grip is a rugged polymer and follow the lines of the pistol perfectly. Dot Size Approximately 0.5" diameter at 50 feet. Adjustment Fully adjustable for windage and elevation with Crimson Trace's precise sight-lock calibration screws Power Source Two #2032 lithium batteries (included). Provide over four hours on on-time use and have a five-year shelf life. Beam Intensity 5mw peak, 633nm, class IIIa laser. Maximum output that federal law and technology allow. Also available in infrared for law enforcement and military only Activation Integrated momentary pressure switch(s) (all models) and a master on/off switch (most models). Holster Ability Fits easily into standard holsters warranty Full three-year no hassle warranty on all parts and labor. Give Yourself the Edge on Accuracy - Traditional combat grip design for comfort & recoil control - Slightly smaller than standard combat grips for conceal carry use - Dramatically improves accuracy on this short sight radius revolver - Fine, smooth checkering for effortless draw - Fully adjustable for windage and elevation - Master on/off switch for system over-ride - Easily activated by left or right handed shooters