The Trijicon AC50016 Fiber Sight Set DI from Trijicon delivers daylight brightness and a constant aiming point with its industry-first interchangeable fiber, enabling field replacement and allowing you to customize your sight with a choice of fiber and ring retainer colors for a personalized aiming solution. This patent-pending design not only keeps your sights bright when you need them most but also provides the flexibility to adapt to changing lighting conditions and preferences, making it ideal for serious handgun shooters who demand reliability in the field or on the range. The DI Night Sights feature a chemical and heat resistant fiber finished with the same proprietary technique as the Trijicon ACOG, paired with a tritium lamp capped by a sapphire jewel, delivering dual-illumination that amplifies collected light for an ultra-bright aiming point from daylight to low light and complete darkness. Built for hard-use environments, these fiber optic sights maintain visibility under recoil and across a range of temperatures, helping you maintain sight picture, quickly acquire targets, and improve accuracy in varied shooting scenarios.