Accuracy redefined! LaserLyte Laser Trainer Pro is the easiest way to train without ammo for your pistol. Become a crack shot without spending cash on expensive training ammo! Get this money-saving LaserLyte Laser Pro to fill the bill. It fits all the most popular pistol calibers. Mounts in the barrel. And has a sound-activated switch, showing bullet impact with a laser dot. Every time your hammer or striker fires, the small onboard laser dot will flash for 100 milliseconds, simulating bullet impact. Highly effective to meet your training needs! Right now it"s LESS, due to our sure-shot buying power! Take aim: Fits tight in your gun"s barrel due to a patented arbor and taper system; For guns chambered in 9 mm, .40 SW, .45 ACP that have a minimum of a 2" barrel; Also fits chambers of a .38 special, .380 auto, 357 Sig., 10 mm and .45 LC; Will not extend more the 1/4" past your muzzle. Makes it easier to train from the holster, concealment or close quarters; Hammer or striker fired Laser. 2"l. Minimum diam. is .1", maximum diam. is .5"; Takes three 377 batteries (included). Become a top marksman, order yours now! WARNING: You must be 18 or older to purchase Lasers. Lasers cannot be shipped to New York City; D.C.; MA or Puerto Rico. Lasers cannot be shipped Parcel Post. Please check your State, County and City laws for restrictions before ordering Lasers. LaserLyte Laser Trainer Pro