[ccmay]

For urban combat, however, I don't think you can do better than the MP-5.

Well, you are the veteran and I am not, but from what I have heard, it is hard to beat one of these:

Loaded with 000 buck alternating with slugs, you have the ability to bend any mob to your will.

-ccm

[ASOC]

I'll second that vote. 9 X .38 cal slugs for one trigger pull.
You can put more lead in the air (or the bad guy) with an auto shotgun then nearly anything else.

I also prefer a good nail gun (bloop tube + flecheets)