A USAS-12 automatic shotgun. I would go with the AA-12, but the drum magazines seem to big to carry a lot of them. Plus, the USAS just looks cooler.
If we're talking fictional weapons, the Dark Energy Gravity Gun from Half Life 2. It'll be fast- but it won't be painless.
If we're talking fictional weapons, the Dark Energy Gravity Gun from Half Life 2. It'll be fast- but it won't be painless.