I was talking to a guy about guns and he said he had a Rossi single shot with two barrels. One is a .22LR and the other is a 3" 20 ga barrel. He won the gun and it has never been fired. I said, "I will take it for $50" He said sounds good to me. So now I have this rifle/shotgun and need to find some info. Can the 20ga barrel be threaded for a choke tube and would it be worth it on a 23" barrel to try making it a 40 yard turkey gun? It is a model S201220RS, so can I get different barrels, like .223, .243, and 28ga. If this does not work out, my best friend just told me his is having a child, so I would wrap it up and give it to the kid in a few years with a brick of .22 shells and some trap loads.