Universal Laser Bore Sighter Red & Green

Red & Green Laser Sight for .17-.50 Cal & 12G/20G Shotguns

The Universal Laser Bore Sighter with Red & Green Laser is a popular type of muzzle inserted boresighting tool. This device helps zero scopes, red dots, or iron sights quickly by projecting a laser dot downrange from the barrel, saving ammo during initial setup. In both red and green laser options for better visibility green is generally brighter and more visible in daylight, while red works well in low light.

These are universal arbor style kits with multiple adapters to fit various calibers from small (.17) up to larger rifle rounds and shotgun gauges (12/20). They insert into the muzzle, project the laser along the bore axis, and allow you to adjust your optics to match the dot (usually at 25–50 yards initially, then confirm with live fire).