This boresighter makes sighting your rifle or shotgun easierthan ever! The SSI laser and unique adapter kit provides stable alignment producing accuratebore sighting results. This versatile system will work on everything from .17 to .50 caliber aswell as .410 20 and 12 gauge shotguns. Complete system includes two sighting posts o-ringadapters reflective target all in a compact portable nylon carry case. ?Muzzle Laser Bore Sight?Compatible with .17 to .50 calibers as well as .410 20 and 12 gauge shotguns ?Reflectivetarget for accurate sighting ?Carry bag included.