S&W rear sight modification question.
On a S&W revolver rear adjustable sight blade that is black, is it possible to either insert a pair tritium dots, one on either side of the notch or to insert some type of white plastic dots, etc. Not looking to paint the blade or for a white outline sight put a 3 dot sight picture. S&W doesn't offer an option. Does nayone know of a gunsmith capable of doing this and if so who is it? Thanks.