I have a 12 bore single shot gun with 2 1/2 chamber.
It's a KFC Model 100 (Kawaguchiya Firearms Company) that I picked up in Japan. It's a really nice looking well made gun with an extractor vice ejector. I'm trying to get some estimate on its age, but the only clue I have is that its chamber is only 2 1/2 inches. At what point did guns start moving to 2 3/4" ? Thanks for any help.


Sincerely,
Patrick