I guess I must be a newbie, but I talked to my Dad earlier and he was telling me about his new gun. He just traded one of his little semi-autos and some cash for a Ruger revolver. I can't seem to find much about it though. What bothers me is that he says it's a 9mm revolver. Do they really make one? I told him that I had never heard of a 9mm revolver, he said that the gun dealer said its "one of a kind". What do you guys think?