I'll only play Airsoft at a field that only allows rentals. A friend had to have surgery to remove a pelt from his hand when some jackass tricked up his gas gun too far. He still can't move his ring finger as well as he could before the incident.
I had a Tippman Prolite that I bought used from a field and fixed as a teenager. I milled the insides down an extra three millimeters and applied a coat of special epoxy that is frictionless when dry. Did the same thing to a bolt I bought, installed a three valve system to allow for a high pressure tank, removed some unnecessary metal to make it lighter and altered a hopper so the paintball weight was balanced above your wrist.
Anyway, stopped playing after most of my paintball teammates moved away for the military and sold the gun for more than three times what I put into it. The guy lives in NJ and I use to see it in tournament pictures a few years after but not anymore.
I miss my baby. I'll rummage for photos in my parent's basement next time I'm over.