The AA 12 has a rail that you have to line up perfectly to insert new mags. It's also heavy with no changeable parts.
A FA s12 is smaller, lighter, shoots the same rounds. You can switch out parts to your liking (grips, rails, sights etc) and you can SBS one down to a really easily manageable
Saiga 12 Suchka
http://youtu.be/WwlmHs_tESs
http://www.youtube.com/watch?v=z66AdC6UhXs
If there is enough interest I may build more
completly legal
No springs No full auto fire control parts Installs on converted s12 with 4 screws in existing holes.
Thanks
http://youtu.be/QKgjeMHQnfU
I cant see the video
Your going to have to go the AOW route if you want a short barreled shotgun. Their is a shop here in Indiana that is making them on virgin receivers. He's got an ad on the class III classifieds and also on gunbroker. You could always cut the barrel down and permanently attach a suppressor, which is the route I'm thinking of going.
Ummm, that's hot.
+1 for the S12; based only upon price, availability, versatility, parts commonality, ergonomics, and weight.