Tactical Laser Bore Sight .177/22LR/9mm/.38spl Cal Red Laser Boresighter End Barrel for Revolvers Pistols Rifle Air Guns Features: 1.ParametersClass IIIA laser, less than 5mW. 2.Multiple Caliber ModelThis is a special laser boresighter for the .177/22LR/.223Rem/9mm/.38spl Cal pistol or rifle. It is directly into the barrel (without silencer), so it is easy to use and very accurately.That is a tool to help you adjust your range and set your firearms on the target quickly. 3.MaterialSturdy brass construction.Using high quality laser module with qualified electronic components to support longer and consistent lifetime. 4.High AccuracyThe fastest red dot laser zeroing and sighting system and save you time and cartridges.Save both time and money by avoiding prolonged live fire tests at the range. 5.Spare Parts 2 sets (6 total) upgraded batteries and multiple spare O-rings(3 total). And come with the portable packing boxes that you can carry with you. Specification: Type: Red Laser Bore Sight Power: Class IIIA laser, less than 5mW Material: High quality machined brass Laser Color: Red Wavelength: 625-650nm Sighting Range: 15 to 100 yards Battery Type: AG3/LR41 Battery Compatible Devices: Pistols, Rifle and Air Guns Caliber: 9mm/.38spl: Suitable for 9mm/Cal.38SPL /380ACP special laser training cartridge works with .357mag/9mm cal pistol or rifle. .177 : Suitable for 17 HMR,0.17,Cal .177, caliber specific. .223Rem: Suitable for 5.56mm .223 chamber and the 22-250Rem, caliber specific. .22 LR: Suitable for .22 LR chamber WARNING: 1.Keep boresight laser beam away from eyes. 2.Before boresighting your scope, make sure that the firearm is unloaded and the muzzle is pointed in a safe direction. Package Included: 1 x Boresighter 9 x O-ring 6 x AG3/LR41 Batteries