Time to go over to Double gun and get some real experts on Belgium guns look at the pics. It then looks like someone converted a set of shotgun barrels into a double rifle, not unheard of.

Also time to do a chamber cast to determine cartridge.

Last edited by erich; 08/12/21.
After the first shot the rest are just noise.

Make mine a Minaska

Heaven has walls and rules, H-ll has open borders