I picked up a couple of trigger springs from Mike Bellum at a gun show and did it myself. His web page has the directions on it, but don`t take out the hammer spring, it is 1 step farther than you have to go. I might also say, as does his web page, that the pull weight your spring says it is may not be what you get. I picked up 2 springs that were suposed to 1 1/2 lb. trigger springs. 1 is about 6 oz. and the other 12 oz. I gave $8 ea. for them, and you really don`t need any special tools to put them in.