TruGlo Brite-Site TFO Handgun Series Tritium/Fiber Optic, Green Front and Yellow Rear SightsFits Springfield XD- The ultimate handgun sight. Uses our patented technology. Unbelievable transition through all light conditions. Glows in the dark. CNC-machined steel construction.Concealed fiber cannot be seen by target. Fits standard holsters. Snag-resistant design.