TruGlo TFX Day/Night Sights Walther CCP Steel Green Tritium/Fiber Optic TG. Tritium lamps are used for low-light targeting because they do not require batteries. TruGlo TFX Pistol Sights have a fiber optic portion that helps the weapon seem to "light up" even more making these TruGlo Tritium & FibOps Sights very visible in action. However the front sight of these sights is actually a quality fiber optic that serves as a light trap to help shooters see the front sight in action. While they are certainly useful in low light situations this sight has additional redundancy in that the rear sight of the TruGlo Tritium/Fiber Optics Sights glows in the dark. This is accomplished by using a tritium lamp in conjunction with a fiber optics component that transmits a part of the sight's light source much like a lamp does. This is how the tritium is charged; it uses the energy from the firing pin to light the tritium in the night for several hours. The night sights also use a high-visibility phantom fiber optics portion to help make the sights even more visible. Plus both the front and rear of these TruGlo sights use the tritium in conjunction with the fiber optics in order to transmit the sight picture to the eye. This is one of the most durable and versatile TruGlo sights you can buy. Specifications for Truglo TG13WA3A TFX Day/Night Sights Walther CCP Steel Green Tritium/Fiber Optic: Manufacturer: TruGlo Gun Model: Walther CCP Color: Steel Black Front Sight Color: Green w/White Outline Rear Sight Color: Green Fabric/Material: Tritium/Fiber Optic Front Material: Aluminum Gun Type: Pistol Illumination Type: Tritium Condition: New Country of Origin: USA Features of Truglo TG13WA3A TFX Day/Night Sights Walther CCP Steel Green Tritium/Fiber Optic: Fully protected TFO technology encapsulated in a virtually indestructible configuration Impervious to oils chemicals cleaning solvents and ultra-sonic cleaning processes Glows in the dark No batteries or light exposure required Assembled with quality Swiss tritium for maximum brightness Front sight Focus-Lock for fast and accurate shooting Fortress Finish provides a permanent protective coating for maximum protection Fits standard holsters. Package Contents: TRUGLO Brite-Site TFX Handgun Sights The Truglo TG13WA3A TFX Day/Night Sights Walther CCP Steel Green Tritium/Fiber Optic is a quality addition to the TruGlo lineup. For more great deals on Tritium Pistol Sights by TruGlo please browse our TruGlo Gun Parts page. TruGlo TG-TG13WA3A: TFX Day/Night Sights Walther CCP Steel Green Tritium/Fiber Optic