I'm a bit curious about something. Seeing as it's a muzzleloader, would it still be classed as an NFA item if you wanted to SBS that bad boy? Not that I would want to, but it sure would make a nice conversation piece.
Someone correct me. I do not think the fact that it is black powder has much to do with the barrel length requirement. If that is what you want, cut ithe barrels down to 18.5 inches and you will still be legal.