High quality and easy to use - Bushnell Banner Laser Boresighter Kit

This unit (or similiar ones) has been around for a long time. It is very nicely made. I am happy with purchase.

When assembling, be sure locking screw (B) registers against the flat on a properly sized arbor. Make sure arbor is fully inserted into bore when screw (A) is tightened. Boresighter with arbor will need to be rotated until optical grid pattern is square with you sights/scope.

Note that basic sights/scope adjustment against the boresighter cross-hairs will only setup your sights/scope to line up with the bore axis. The bore axis is a theoretical straight line, but the bullet (in reality) travels in an arc. You will therefore still have to make allowances for bullet drop at the paper target distance you choose. Start close in and work you way out, and you "can't miss".