Originally Posted By: xphunterLee,
How old is your boy?
Choose a regular rifle scope with the longest eye relief you can find, then have him pull back to where he starts to see a dark ring around the edges.
It will give him plenty of room.
Also, a muzzle brake would really take care of any scope bite issues
He's 7, he shoots my scoped air rifles very well, he shoots a scoped crossbow and also shoots a 410 shotgun and he killed his first deer with it last season using 3" 000 buckshot.