I saw this a few years ago. It's a rifle scope that only shoot when you have your cross hair on the target. Even if you pull trigger, nothing will happen unless target is on the cross hair. Could this scope be set up for airgun? They claim you will never miss your target.
http://m.youtube.com/watch?v=Pmteh_NChOQ
http://m.youtube.com/watch?v=Pmteh_NChOQ