20Ga Shotgun Laser Bore Sight from Vector Optics & Arsenal. Get your rifle sighted in without wasting your expensive ammo. Casing is high quality brass with precision laser for accurate sighting again and again! Comes packaged in blister package with instructions and batteries.
These are the highest quality cartridge Bore Sights you can purchase and are constructed of brass to prevent barrel scratches or damage.
Red Laser module: 635nm 3mW(high brightness)
Working current: Less than 20mA(less power consumption, more efficiency)