12 Gauge AR-10 style Shotgun? By Atticus | February 14, 2013 - 5:30 am |February 13, 2013 Ammunition, AR Platform, REALLY?!?!, Shotguns YES PLEASE! Oh wait… it takes proprietary ammunition? Hmmm maybe not yet. Saw this over at The Firearm Blog and all I can say is (click the link to read more about it) Share us Bookmark the permalink.