Product DescriptionWhen the lights go out, your sidearm doesn&';t have to be left in the dark. The TRUGLO Tritium Pro Handgun Sight Set transitions from bright white dots in daylight to glowing green tritium in darkness, providing fast target acquisition around the clock. A front sight Focus-Lock ring speeds up front-sight focus, while the angled rear sight edge enables emergency one-hand operation. Built with a compact profile that maintains the factory sight radius, Tritium Pro sights deliver durable performance with TRUGLO&';s protective finish and are compatible with popular FN .40-caliber models.Product Highlights Battery-free tritium illumination that glows in low light and complete darkness Front sight Focus-Lock ring for rapid sight alignment and faster shots Angled rear sight edge for emergency one-handed slide operation Compact design maintains factory sight radius and fits standard holsters Assembled in the USA with quality Swiss tritium and rugged protective finish Specs Product Type: Tritium night sight set (front and rear) Compatibility: FN Herstal - FN FNS-40, FN FNX-40, FN FNP-40 (including compact) Sight Color: Green tritium with high-visibility front ring Country of Origin: USA UPC: 788130023976 MPN: TG-TG231F2W Brand: TRUGLO Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.