The Crimson Trace Lasergrips platform is a decisive tactical advantage for handguns and changes the way gun owners approach personal protection. It offers 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, easily user-installed with zero modification to your firearm and are completely user-adjustable for windage and elevation. *Note- fits S&W models 10 thru 19, 48, 53, 56, 64 thru 69, 242, 296, 547, 581, 586, 617, 647, 648, 686, 696 and Governor.