Red Laser Bore Sight Kit Boresighter for .22 to .50 Caliber Scope Handgun Rifles This collimator is suitable for sighting scopes in rifles and shotguns without firing a shot Sight with emit a straight red laser beam, providing precise reference for zeroing scope and sight alignment Light weight and durable Comes with tools, four adapters, and six extra batteries Fit any 0.22 to 0.50 caliber (5.59mm to 12.7mm dia.) handguns, rifles, sights and scopes