I put a rifle scope on my Ten Point Elite. I've heard more than once that a rifle scope is not designed for the recoil/vibration of the crossbow and the eyepiece will crack where it threads on to the tube.
I figure maybe these scopes are cheap. My scope is a 40 year old Bushnell and I've shot it on the crossbow at least 50 times with no ill effect. Anyone have an opinion on this?