I live in NYC. Shotgun permits are easier to get than pistol ones. I was thinking of a Mossberg .500 or Winchester Defender, but this is sweet.
I have a Mossberg 88,,,8,2 3/4,,,OO buck,,,20”bl.,,,
OO=9 balls each=72 rounds on target Chop,Chop,,,
Points great...;0)
Here is a detailed article on the AA-12
http://www.defensereview.com/auto-assault-12-shotgunfrag-12-high-explosive-round-comboweapon-system/