04Red-Laser-Boresighter-Bore-Sight-Caliber-Cartridge-Boresight
Will NOT Work With Any Glock ,The Laser Boresight do not fit for a 9 x 19 mm, 9 mm Luger/Ruger and 9 mm parabellum.
Insert the batteries and screw the cap on the housing to turn on the laser; remove the batteries to turn off. Insert the entire assembly into the chamber, gently close the action, and aim at a target 20-30 yards away. Adjust windage and elevation of the scope or sights so point-of-aim is zeroed on.Reliable and durable. Easy to pack and travel.