Here is a detailed article on the AA-12
http://www.defensereview.com/auto-assault-12-shotgunfrag-12-high-explosive-round-comboweapon-system/
Sweet, but I live in NYC. 00 buckshot should be more than sufficient. I’m not even sure that I can get that in NYC. Speaking of moot, I found that I’m too close to a school to get a gun. I’ll have to trust the doorman.