Wouldn't General Pain be carrying something like this?
The Pfeifer Zeliska .600 Nitro Express revolver
http://www.documentingreality.com/fo...handgun-21463/
http://en.wikipedia.org/wiki/Pfeifer...press_revolver
http://www.vincelewis.net/60magnum.html
I think with one of these, he might be tempted to take on tanks by himself