SME End of Barrel Laser Bore Sight Red Laser Basic

GSM End of Barrel Laser Boresight - BasicFor use on .17 to .50 caliber and 10, 12 & 20 gauge shotgunsIncludes Calibration Target and Carrying tubeGreen lasers project brighter and are highly visible at long distancesEnd Of Barrel Laser Bore Sighting SystemsPatented designDurable machined aluminum constructionUnit includes (3) three LR44 Alkaline button cell batteriesNo metal on metal contact, will not scratch the finish of the barrel or damage your rifling