Illegal here in Wash. St.

The barrel twist around on a swivel just in front of where you would cock the gun. Its italian made but i couldnt find who made it because it was old and most of the writing was worn off. apparently its pretty valuable. hes been offered a few thousand for it but wont sell.

Didn't CVA have a over & Under .50 rifle some time ago?
I think you could adjust the lower abrrel slightly to get it to hit the same spot that the top barrel did..

Traditions still makes a double over under muzzleloader like and over under shotgun sells for about 1600.00