Calibrate your targeting to hair - splitting accuracy with a UTAC laser boresighter. SAVE BIG! Convenient, accurate and easy. Finding your targeting system isn"t quite hitting the mark like it used to? Don"t replace... re-calibrate! All you do is chamber the unit as though it were a round, and a red laser dot will show you exactly where your aim will land the shot. From there, you can adjust your scope or sights without ever wasting ammo! Save time, money and frustration with UTAC! Line it up: Perfect for hunters, competitive shooters and law enforcement; Easy to use; Improves accuracy; Reduces ammo waste; Compact, lightweight and durable; WARNING: You must be 18 or older to purchase Lasers. Please check your State, County and City laws for restrictions before ordering Lasers. .308 Winchester 7.62x51mm .243 7mm-08 Remington Caliber Cartridge Laser Bore Sighter Boresighter Quality grade Brass Casing Precision Laser Optics Sits perfectly in the chamber Quick and easy sighting and zero No more wasting ammo