The Rival Arms RA1A231G Night Sights for Glock 17/19 combine a front sight with a Green Tritium insert and an orange outline with a rear sight that features Green Tritium and a Black Outline, delivering fast target acquisition in low light while maintaining a clean, professional look. Designed to fit all double-stack 9mm Glock models across generations, these sights are built to directly replace factory components for standard height applications, ensuring seamless compatibility with most holsters and optical setups. The M.O.S. variant is optimized for Glock MOS slides and other slides mounted with optics, providing proper co-witness through the optic to help maintain sight alignment when a red dot is engaged. Crafted by Rival Arms, the system pairs durable construction with precise dot geometry to enhance reliability and accuracy in a variety of shooting environments, from duty and duty-style applications to competition and personal defense. With a low-profile silhouette and Tritium illumination, users can quickly align sights in dim conditions without sacrificing daylight visibility, making these sights a practical upgrade for Glock 17 and 19 platforms seeking improved sight picture and intuitive, consistent aiming.