Well, this could have ended badly. Over the weekend, police approached a visibly drunk gentleman at a Bronx, New York subways station when they spotted a long, bulky item going down his pant's leg. (Heh). It turned out to be a homemade "gas-operated one-shot rifle." From the New York Post:
[37-year-old Melvin] Montoya allegedly told cops he built the device himself, and that it was capable of firing rounds, sources said.
He was charged with multiple counts of criminal possession of a weapon – one for possession of a disguised gun and another for carrying a gun as a convicted felon, cops said.