Red Laser Dot 223 Boresighter .223 REM Brass Laser Bore sight for Rifle GunRed Laser Dot 223 Boresighter . 223 REM Brass Laser Bore sight for Rifle Gun ITEM DESCRIPTION Laser Cartridge Boresighter for 223 Rifles This compact boresighter system is designed for sighting in your rifles without firing a shot. Simply install the included batteries, place the entire assembly into the chamber, and gently close the action. The sight will emit a straight red laser beam, providing a precise reference for zeroing in your sights or