I have heard about a "Triple Shotgun" used by Luftwaffe Pilots in North Africa for a very short period of time. It was called the "Dreilingsgewehr" (Drei=Three, Gewehr=Gun.) It was a double-barreled 12 gauge shotgun on top, with a rifle on the bottom. The rifle shot a .30-06 round. They were very expensive to make. So far I can only find one picture of it. If you have any other pictures or info please post them.