I'm wondering if it is possible and realistic to consider putting choke tubes in a cut down cyl & cyl damascus barrel?

Gun in question is a J Lang hammer gun. The barrels have been cut to 26" and are cyl and cyl. I'm not sure but it appears the barrels have also been reamed. I am unable to measure the wall thickness since I haven't been able to locate a guage in the Calgary area.

Nothing is foolproof to a sufficiently talented fool.