Trijicon can remove (and thus replace) the tritium capsules in sights that are already installed. I had them do this for me once, about two years ago. If I remember correctly, they charge $18 per capsule. So, it would be $54 for all three dots. They can put in any color you wish at that time, although they only offer green for the front capsule.[b said:Quote[/b] (Administrator @ July 24 2002,6:32)]Not too long ago, a thread I posted over on TFL asked whether or not vendors of night sights can replace the tritium tubes used, or if we users get smacked another ~$100 for a new set.