Using battery power, the Bushnell ® Laser Boresighter emits a bright laser for precise sighting. Its bright, battery-powered laser makes rapid, ultra-precise work of boresighting. Created to meet the demands of gunsmiths and serious shooters, it includes bore adapters for .22- through .50-caliber firearms. ** Learn more about THE PROS Gun Services available at all DICK's Sporting Goods locations ** FEATURES: Battery powered Precise bright laser Includes arbors for .22 through .50 cal. firearms Bushnell