Drop Epp's a line. I seem to recall Doug saying something about mossberg barrels, and he is a licenced manufacturer.
I don't think you can just drop in a shorter barrel. I think that the mag tube needs to be shortened+rethreaded for it all to work. I think a slightly shorter barrel is possible on the 18.5" without modification but a 14" barrel requires a lot more work then just a barrel. I could be wrong but i thought i remembered reading it somewhere which might be why it hasn't been done by a manufacturing company in Canada.




















































