The Defender Series Glock Accu-Guard Laser Sight from Crimson Trace is a made in the USA laser sight crafted from polymer and nylon, so you know it's built to last. The Defender Series Accu-Guard Glock Red Dot Sight is a class 3R laser with a red beam intensity of 5mW peak, 620-670nm. The laser is pre-sighted in at the factory at 50 feet, and can be easily adjusted with the provided .05" wrench. The N-Gage activation provides a large, easy-to-find, bright red activation button. All you have to do is simply press the button before engaging the target to activate the laser. Defender Series features high-tech, micro-electronic components that are designed by a skilled team of award-winning engineers. Includes a one-year manufacturer's limited warranty.
Full compatibility list: Third-generation Glock 17, 19, 20, 20SF, 21, 21SF, 22, 23, 31, 32, 34, 35, 37, 38; Fourth Generation Glock 17, 19, 20 , 21, 22, 23, 34, 35; Does NOT fit, baby Glocks or Glock without rails (Gen 1 and Gen 2) or models 29 or 30.