There is, to my knowledge, not made a mix of a 12 gauge shotgun and a .500 nitro express double rifle. But in the time around the end of the 1800 and the beginning of the 1900, there were made something called a Paradox gun. It is a 12 gauge shotgun but with a rifling at the end of the barrels so it could shoot solid lead bullet. It was made for short distance hunting for big game. They are quite rare and very expensive.

Tak for tilbagemeldingen, den er værdsat. Med lidt held kan man finde det man søger i jagtforretninger og hos private.

It is referred to as a "model 215 Kettner" by Grulla Armas. It is made on a Grulla Model 215, and it is a bespoke gun.