LaserLyte Laser Trainer Barrel Glock 17/22 LT-GL Fits your favorite GLOCK 17 or 22 The replacement barrel shoots a laser dot that simulates bullet impact, providing the shooter with immediate feedback Replacing the factory barrel, the laser trainer cannot accept live ammunition Fires a sound-activated laser when the user pulls the trigger Allows Shooters to gain confidence and muscle memory without the added cost of expensive ammunition Power Output: 650nm, 5mW, Class IIIa