The Trijicon 601118 DI Night Sight Set combines daylight-bright performance with a reliable, constant aiming point for Springfield Armory XD-S and XD-E pistols, excluding OSP models, by pairing a Green/tritium fiber optic front sight with a Black Outline rear sight. Designed for shooters who demand versatility, this dual-illumination system features an industry-first interchangeable fiber that can be replaced in the field and customized with a range of fiber and ring retainer colors to tailor your sighting solution to different lighting conditions and personal preference. The DI Night Sights use a chemical and heat resistant fiber finished with the same proprietary technique trusted across Trijicons line, capped with a sapphire jewel and a tritium lamp, delivering an ultra-bright aiming point from daylight to near darkness. This patent-pending design ensures fast target acquisition with a clear, high-contrast sight picture, so you can maintain accuracy and confidence whether on a bright sunny day at the range or in low-light scenarios on patrol or duty. Built for durability and long-term reliability, the sight set integrates seamlessly with Springfield Armorys XD-S and XD-E platforms, offering a rugged upgrade that preserves natural lighting cues while enhancing nighttime readability and precision.