Product DescriptionThe Sightmark Universal Red Laser Boresight delivers fast, precise zeroing for a wide range of firearms. Attaching magnetically to the muzzle, it projects a bright red laser dot to indicate point of aim, letting you align optics and iron sights without firing a shot. Designed for multi-caliber use from .17 to .50, this compact tool includes a carrying case and three AG3 batteries for go-anywhere convenience, and is backed by a limited lifetime warranty.Product Highlights Magnetic muzzle attachment for quick, tool-free setup on most rifles and pistols Universal multi-caliber compatibility from .17 to .50 for versatile use Bright red laser for clear point-of-aim reference and faster zeroing Includes carrying case and batteries to keep you sighted-in at the range or in the field Durable brass construction with a compact, travel-friendly design Specs Laser Color: Red Laser Wavelength: 632-650 nm Output Power: