Red Dots are very simple. Set a target up 10-15 yds away. Draw a small circle. Shoot your gun from a shooting bench or something that can hold the gun steady on the target. Aim directly at the circle you drew and fire. Adjust up-down, left-right to make your dot be aiming directly at the point of impact from your shot. Take another follow up shot and you should be in the bullseye. Its as simple as adjusting the dot to the point of impact.