My carry guns all have Trijicon "Bright and Tough" GL01 tritium sights. Never tried fiber optics on pistols, but I have this weird notion that fiber optics are for BB and pellet guns.[Duno] My tritium sights probably each have a good 4-5 years left before they need replacing. Hopefully I'll have a chance to try out something else by then so I can make an educated decision.