I found this kind of ironic. I haven't seen one in years, or even heard of them being used for at least 10 years, then I read this, and that night a guy here in town came over and asked me if I'd know how to build them and if I would make a couple for him. I told him that he'd better check and make sure that they are legal, then we'd talk about how much I'd charge for a set. He wants them chambered double, a 12 ga. and a .44 mag cartridge, I told him I didn't think I could make a barrel strong enough for the mag though!!!! lol