Nobody has guessed what the gun is yet, but I can tell you that it doesn't require hearing protection. Actually, one person FreepMailed me, and HE knew what it was. Most likely, only kids and younger people are going to guess. If I don't get any more correct guesses by after supper, I'll tell you what the dastardly looking thing is! :-)
Shoot, that looks like a paintball gun. Naw, no hearing protection needed there, eye protection yes, hearing, no.
I imagine that the black cylinder above the magazine and to the right of the upper is filled with little plastic balls!