As far as I know it's strictly for military use.AA-12? It's not available to the public is it?
In 2004, ten firing models of the AA-12 were produced and demonstrated to the United States Marine Corps.
The HAMMER unmanned defense system by More Industries uses dual-mounted AA-12s on the H2X-40 Turret. Neural Robotics has also mounted the weapon on their AutoCopter Unmanned aerial vehicle.