Well here is the deal, MMC received my slide and called to tell me my MMC adjustable sights are just regular white dot sights, NOT night sights that have expired. I learn everything by trial and error:90: Anyway, still good news, they are going to modify them and put in tritium. This will cost $55 to do the front and back and $12 shipping. This is still a great deal being as the base price for these new would be about $166 . They do warranty the tritium for 15 years and will replace them for $12 . Very nice folks. I had them do the front and rear in green, I hope that was a good choice. I will post when I get them back, they said about a week.