SightMark USED Sightmark Laser Bore Sight, .223 Remington, SM39001, EDEMO19, Condition Like New, Inspect and Rebox

You can use them on shotguns handguns rifle scopes and adjustable iron sights The caliber-specific laser boresight fits into your firearm s chamber and emits either a red laser or green laser (depending on which model you choose). The laser then appears as a green or red dot on your target.