How do I handle this one? What is an appropriate punishment(s)?

My son pointed and dry fired an Airsoft rifle in his friends ear and may have ruptured the ear drum. Too soon to tell and not at issue here. And the issue of pointing even a toy gun is being dealt with.

What I would like is to hear what the collective would think is good punishment. He loves X-Box and has on line privileges. He has computer and a cell phone. He loves to bowl otherwise as very little other outside activities. He is 12.

I am interested in type of punishment, that it is appropriate and the suggested duration for this way serious event.