Add this SiteLiteA(R) Laser SL-150 Boresighting System to your range bag and stop wasting money on ammo while sighting in your rifle or handgun. Super-bright red laser Super-strong magnets securely center the laser within the muzzle for consistent accuracy Fits .22 to .50 cal., 20-gauge and 12-gauge shotguns, plus muzzleloaders No metal contacts the rifling, no optional arbors needed Unconditional Mfr's Lifetime Warranty Order yours today!