Universal Laser Bore Sight Kit for .177 to 12ga Multiple Caliber, Barrel Laser Boresighter with Press Switch for Rifles and Handgun Hunting Scopes with 2 Batteries

12 ADAPTERS: More adapter size options than other brands. Laser bore sight kit with multiple caliber fit any 0.17 to 12ga handguns, rifles, shotgun, which allows the accurate bore alignment of scopes, iron sights or laser sights on handguns and rifles.
CAUTION: This tool is not available for the barrel with silencer. Keep the red laser beam away from eyes.
HIGH ACCURACY: We tested every product twice before it is packed, and the upgraded adapters insures the boresighter is much more accurate than others.
EASY TO USE: Comes with tools, just following using manual, choosing proper size adapter and insert the laser unit in the muzzle.
【LONGER BATTERY LIFE】: Upgraded the battery of the laser bore sight - 2 CR2 battery has ultra-long battery life and longer service life.