Ammo has varied sizes of shot-shells, plus slugs, plus exotics some of which you can load yourself. [3/8inch lead sinkers crimped on thin aircraft cable or piano wire; tacks; rocksalt; etc.]
Apply hacksaw to spare barrel and instant hogsleg.
Best all-around short to medium distance firearm.
12ga again!
OK, I am convinced. I will get one.
Oh. Do you or anyone else know anything about our friend Bin Laden's "status" AK? Is it the Officers Model one, that shoots the shortened case round. I believe it has a gas chamber at the muzzle to build up pressure to cycle the action.
P.S.: to illistrate our point, a guy in T.V.'s Miami Vice used an abbreviated (forgot model #) Ithaca 20ga. pump, w/muzzle at mag. cap, and a little tab hanging down, to encourage one to go home with two paws intact. You know, when the system has crumbled, and it's dog-eat-dog, a fella figures these things out for himself anyway. One poster said something like "only one gun?...then I'll have yours!" Tally-Ho!