Theopot Laser Sight Red Dot Boresighter with Three Sets of Batteries (7 Options)

Class IIIA laser, less than 5mW. Faster gun zeroing,high accuracy,reduce cartridges and shells wasted.Made to fit the .223 chamber, caliber specific. Comes with 3 sets updated batteries (9 AG3 batteries) which can last two hours. Before use it, remove the plastic packaging of the batteries. Easy to sit perfectly in the bore,sturdy brass construction,the boresighter is high quality. By projecting a straight red laser beam from the center , providing a precise reference for zeroing in on your target, allows for quick and accurate resetting of any sights.