The Crimson Trace Lasergrips platform is a decisive tactical advantage for handguns and changes the way gun owners approach personal protection. It offers an immediate targeting laser beam when you hold your gun in a natural firing grip. The Instinctive Activation, saves precious time when seconds count. The Lasergrips features a master on/off switch, are easily user-installed with zero modification to your firearm and are completely user-adjustable for windage and elevation. *Note- fits 1911 and 1991A1 full-size frames, including: Auto-Ordnance, Les Baer, Colt, Kimber, Nighthawk Custom, Olympic Arms, Para-Ordnance (full-size, single-stack), Safari Arms, Sig Sauer, Smith & Wesson, Springfield Armory, Taurus, Dan Wesson, Wilson and most other 1911s with grip screws measuring 3-1/16″ apart.