I agree there is nothing in the regs, but that ain't gonna stop Mr. Game Warden from causing you alot of trouble. A good high capacity semi-Auto should be enough, going full auto just doesn't sound very effective or safe.
I agree 100% with the use of machine guns, short of Maj.'s minigun......Imagine that on a herd of hogs......
A silencer on the other hand, might be beneficial on hogs!