LaserLyte Laser Trainer Universal fits 380 ACP 9 MM 40 SW 45 ACP Sound Activated Laser Training System Fires a red Laser dot simulating Ammo Shooting Practice Will Improve with Dry fire INSERT INTO the chamber pull the trigger the laser ammo will fire a dot for 1/10 second simulating bullet impact. The tool free quick adjustment system will fit almost any caliber from 380acp to 45acp including 40sw and 9mm luger 357 sig J FRAME REVOLVERS snub nose work great with this laser system 38 special caliber the red laser dot is also adjustable once mounted in the barrel use the tools to move the dot for the best laser shooting training for dry fire practice SAVE TIME and money train at home no need to go to the range all the time when you can be at home on your own indoor range NO NOISE traffic or expensive ammo to burn up just the sound of clicks and the laser dot change batteries in 3000 shots TRAIN INDOORS on or off your favorite couch with air conditioning works with all LaserLyte targets practice trigger control sight alignment improve your skills or teach a kid or new shooter safe shooting skills fire the laser for instant feedback BRIGHTEST AND MOST POWERFUL laser we are legally allowed to produce. The bright laser dot can be seen over 100 yards away at night. Power Output: 630 - 670nm, &lt;5mW, Class: IIIa Fires laser dot for 1/10 of a second fits calibers .380ACP to .45ACP quick tool free caliber adjustment works with snub nose revolvers