Leupold's ScopeSmith Magnetic Boresighter

Leupold's ScopeSmith Magnetic Boresighter

Using a built-in magnet, Leupold's ScopeSmith Magnetic Boresighter attaches to the muzzle of any caliber firearm,and makes sighting in easier than ever. The compact boresighter operates with any optical sight, requires no barrel spuds or batteries, and is suitable for the workbench or out in the field. About $68.