Thanks guys for the quick response, I had many S&W models before, 3904, 3913, 5906 square triger guard, but last sunday I went to the gun show in Miami just to get some 357 mag bullets, and when I saw this 5906TSW I fell in love with it, even do you can tell that it has some use on it, I still got it any way, paid $400.00 for it, it has the knight sites and rubber grip, I just ordered the extractor for $27.00 how difficult is to replace it? can some one walk me thru? I have tried to find a gunsmith here but I guess is really hard to find one, I have called a few shops and they don't have one at the store.