Trijicon self-luminous iron sight are proven to give shooters five times greater night fire accuracy- with the same speed as instinctive shooting. Trijicon is proud of its reputation for incredibly reliable night sights. The unique shock resistant design is patented and used exclusively by Trijicon. That's why Trijicon Bright & Tough night sights are the first choice of major handgun manufacturers, and standard issue with hundreds of municipal and county departments, numerous state police departments and several federal agencies.