Well, I got my original cylinder stop, as well as several Uberti parts (hand, screws, front sight blade, hand spring). I general, these Uberti parts don't fit too well. Fortunately, I am able to modify the Uberti parts with a little TIG welding and diamond files to work just fine. In general, I don't think I'd recommend trying to replace original parts for a 1st Model Americn with Uberti parts unless you plan to do a fair amount of modification on the Uberti parts. By the way, my rule of thumb is that the American parts stay original and unmodified; modifications are only done on the Uberti parts. Anyone who takes a file to any original parts needs their hands slapped.