Yeah, I think it's the forward- mounted feed and the Hugh Jass- style banana clip that make for the SMG look.
If you want some inspiration for the big- mama handgun look, you can't go wrong with the
Desert Eagle.
It's kind of 1911-esque, but fatten it up some and it's about the right size. Plus, it's got plenty of protrusions to play around with, and even the beginnings of some curves that could easily be exaggerated. You could even make a larger clip that hangs down from the bottom of the grip if you wanted.
OK, that's all the butting in I'll do... given what you did with the shock rifle I'm sure you'll find something that makes you (and most other folks) happy.
