The final word on the guns in the movie Tombstone is a book by Peter Sherayko. He played Texas Jack, was the armorer and headed up a group of extras that hang together and do historic movies. Book list almost every gun that was used, original or repro, why a gun was carried by whom and what they had to do to get the originals up and running. I have the feeling that the Quickdraw is a name given a model by a repro company. I have the book but it is 8 hours away at home while I'm on a project site.