Save time when sighting a newly mounted scope with this Bushnell Laser Boresighter. It features a bright, battery-powered red laser that makes rapid, ultra-precise work of boresighting so you don’t waste any ammunition during the process. This easy to use hunting gun accessory was designed to meet the demands of gunsmiths and serious shooters. It includes arbors for .22-50 caliber rifles or handguns and 20 and 12 gauge shotguns. The lightweight unit runs on three LR44 batteries which are included. A simple twist of the end of the Bushnell 740100C boresighter activates or deactivates the laser.