big ken,,, all you need is a flint tc breech plug for that size barrel and you can make one up. it takes patience and a little know how. you can make your own drop in barrel. in reality, you don't even need the breech plug, but making a plug to fit the TC tang requires alot of work. As an old gun smith I knew said, take a piece of steel and file away everything you don't want. A company did offer plugs that screwed into standard threaded breeches that fit the TC tangs, but I haven't seen them in years. I have fitted Tc breech plugs to NON TC barrels and installed underlugs, underribs and thimbles to make them fit a TC gun.
