TruGlo TFX Day/Night Sights MOS Adapter Set for 9mm .40 and .45 Glock 17/19/34/35/41 Gen 4 Tritium Green w/White Outline Black TG. With an ultra-durable sealed capsule design solid steel body and a 12-year mfg warranty TFX sight are built to last and to perform when brightness counts. Built with a sealed capsule and Fortress finish to handle just about anything.F.A.S.T Rear Sight: A simplified combination of a battue-style sight and express sight provides quick and intuitive sight picture.TFX Front Sight: The combination of a Tritium vial fiber-optic and FOCUS LOCK ring provides a bright and accurate point of aim in any light. Tritium vial glows constantly - Fiber-optic gathers and directs surround ambient lightOptional Purchase: Change rear sight insert colors for increased visibiltiy and a custom look : Green - Orange - White - Glow-in-the-Dark (White is included with this purchase). Specifications for TruGlo TG13GLFST TFX Day/Night Sights MOS Adapter Set for 9mm .40 and .45 Glock 17/19/34/35/41 Gen 4: Manufacturer: TruGlo Gun Make: Glock Gun Model: Glock 34 Gen 4 Glock 41 Gen 4 Glock 35 Gen 4 Glock 17 Gen 4 Glock 19 Gen 4 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 Package Contents: TruGlo TG13GLFST TFX Day/Night Sights MOS Adapter Set for 9mm .40 and .45 Glock 17/19/34/35/41 Gen 4 The Truglo TG13GLFST TFX Day/Night Sights Glock 17/17L/19/22-28/31-35/37-39 Tritium/ 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-TG13GLFST: TFX Day/Night Sights Glock 17/17L/19/22-28/31-35/37-39 Tritium/