Well that's pretty cool.
Via: Range 365
The AA-12 shotgun is a beast. It’s a fully-automatic 12 gauge shotgun originally designed back in the 1970s by Max Atchisson (the AA stands for Atchisson Assault) specifically to be a low-recoil option for law enforcement and military personnel.
It was intended for close-quarters combat, specifically, room clearing and ambush operations, in spaces with limited visibility, like city streets or thick jungles.
Ever since, it has largely been verboten for civilians in the U.S., as there was no semi-automatic version of the AA-12, until now.
Read more here.