The way I read the article about the Juch, it has three 10 ga barrels and two rifle barrels, chambered for some unspecified .577 caliber cartridge. The front trigger works as a single trigger, for the three shot barrels and the rear trigger works as a single trigger for the two rifle barrels. The gun passed proof without a problem, The parts inside were made by hand to fit into the available space and to function properly. The owner stated his intent to hunt Geese and Ducks, but the more likely purpose is for a collection and sample of gun making that is not likely to have been seen by anyone else. At 22 pounds, t is not likely to be very useful for hunting, however.
Mike