Found a nice 6" 17-1 in local gunshop. Target trigger and hammer. Nice. Tight. Very good blue. Price is $500 before the haggling starts. The hammer is odd. On the top of the hammer is a little tab sort of thing. Roll it forward and the hammer will not hit the firing pin. Thus you can dry fire the revolver without damage to the chambers. Roll the tab back and the hammer hits the firing pin normally. I have not seen this before. A standard S&W type hollow rivet holds it in the hammer. In ever respect it looks like a factory item. What is it? Am seriously trying to figure a way to get the revolver. Tonight I will be doing some serious talking with the wife. It is a pretty thing... just ideal to go with my M-18. Any ideas, information would be very much appreciated. Sincerely. bruce.