"Peter Wiley" wrote
My picks if I didn't care much about collateral damage:

1. flamethrower. Bit difficult to get hold of, tho.

2. pump action shotgun loaded with buckshot.

3. Any decent semiauto .308 loaded with 150 gr JHP

4. Any decent semiauto .223 loaded with 50gr JHP.

Factor one more item into it - police both before and after the action. If
y'all have a 'vigilante weapon' they are likely to freak out and take it away
from you to avoid you killing somebody. By the same token, if you do have to
shoot, they're likely to be more understanding if you use a 'hunting' or
'target' gun. So the only one on the list I'd pick is the guage.

The 308 loaded with FMJ is going to go thru the bad guy, his buddy
behind him, the house behind *him* and maybe a few other items .....

..... including the little old lady on the next block. Great military weapon
tells police & prosecutors that y'all must be a vigilante looking for an excuse
to kill. Avoid that appearance. Don't forget to shriek "Don't hurt me! Please
don't hurt me!" while shooting them in order to support a self defense plea
later.