The XS Sights GL0010S5N DXT2 Big Dot Night Sights for Glock deliver rapid target acquisition with a bright, long-lasting glow thanks to tritium-powered front and the option of tritium or non-tritium rear sights, making them an ideal upgrade for Glock 20/21/29/30/30S/37/41 pistols. The laser-focused Big Dot front measures 0.188 inches, paired with a high-contrast orange outline for quick front sight tracking, while the green tritium rear and white outline or stripe options provide a clear dot-the-i sight picture in low light, ensuring confidence in dim environments. A low-profile V rear enhances front sight visibility, and a rear sight ledge facilitates one-handed slide manipulations, adding practical function to duty or personal defense pistols. Crafted from durable CNC machined steel, these Glock sights resist the rigors of field use and daily carry, and they fit standard holster options. With a 10 Year Warranty and a 30 Day Satisfaction Guarantee, XS Sights combines reliability and performance for hunters, shooters, and professionals seeking fast, accurate aiming in daylight and darkness alike.