Each pistol red dot is a little different; but use the same process for zeroing any of them. After mounting the red dot, fire a single shot from a supported position at 5, 10, or 15 yards. If your shot isn’t on paper, move closer and try again. If you can see your impact, adjust the windage and elevation (horizontal and vertical) to move the bullet impact closer to the dot. Fire, adjust, and repeat until you’re zeroed, then fire a group to confirm.