I looked at MP front sight (trijicon HD) and it appeared the base was too shallow for 3rd gen. If someone knows what model trijicon HD might work for a 3rd gen, please let me know. Trijicons answer is they dont make a HD for 3rd gen S/W. I have several bad front night sights , maybe they can relamp them with the HD type orange filler or not. I will have to check that route.