Depends on the boy......... is the reason it shouldn't be done.

Look at the results.

thats happen to me twice(my friends) i got a black mountian and shoot 150 grains with a 45/70 saboted bullet....they wanted to use(shoot it) at the range and one was looking at the open sights(gun's got look thru rings) and after the shot he said take this thing! i said whats the matter...scope hit me in the forehead.......oh, my other friend I told him look out for the scope he had is eye right up on it...he said I got it....he did too...took it in the nose bleed everywhere...my friends are big, i hope the kid's allright