On Guns International a while back a guy was selling a cut down 1880's hammer double barrel 12 gauge with a 13" barrel. I wrote him and said it was the coolest gun but is illegal. He said it was OK 'cause it was so old. I doubt it. What do you think? Another thing. My friend said you could put a permanent choke on a sawed off shotgun (16" or so, I guess) to extend it to a legal 18". That doesn't apply to the gun mentioned above but do you think he was correct?