The Crimson Trace Lasergrips platform is a decisive tactical advantage for handguns, and changes the way gun owners approach personal protection. It offers what no other handgun accessory can: immediate targeting laser beam when you hold your gun in a natural firing grip. The innovation, 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. LG-417 fits only Gen3 Glock 17, 17L, 19, 22, 23, 31, 32, 34, 35, 37 and 38.