I just bought a Target Sports 1X20 Red dot to put on Kel-Tec Sub 2000 carbine. I was wondering how to mount the scope and be sure that it is really vertical. I have never done this with something with no crosshairs so I really have no where to start. I know that I don't plan to shoot much over 75 yards so if I have to just eyeball it that would be fine but I would much rather prefer to have it right. Wanna kill these ads? We can help!