Check the listing for details. TruGlo Tritium Handgun Night Sights for Glock 17 19 22-24 26 27 Green - TG231G1. Color: Green Front/Rear, Condition: New. Listed at 54.99 USD. TruGlo Tritium Handgun Night Sights for Glock 17 19 22-24 26 27 Green - TG231G1 TRITIUM night sights are a popular choice among firearm owners, particularly those who value reliability and low-light performance in their sights. It's important to note that tritium has a finite half-life, and over time, its glow may diminish. Therefore, it's recommended to periodically check and replace TRITIUM night sights to ensure their effectiveness, especially in critical situations where visibility is essential. Day and Night Visibility: TRITIUM night sights offer visibility in both daylight and low-light or nighttime conditions. During the day, they function like standard white dot sights. However, when the light diminishes or goes out entirely, they transition to glowing green dots for enhanced visibility. Tritium Illumination: These sights are illuminated using tritium, a radioactive isotope of hydrogen. Tritium emits a faint glow in the dark due to its radioactive decay process. This means that TRITIUM night sights do not require batteries or external light sources to charge them up. They continue to emit their glow consistently without any user intervention. No Need for Charging: Unlike some other night sights that rely on external light sources to charge luminous materials, TRITIUM sights are always ready. They do not require exposure to light to activate the illumination, making them a reliable choice for low-light or emergency situations. Glowing Green Dots: Tritium typically emits a greenish glow, which is easy for the human eye to detect in low-light conditions. This makes it suitable for quick target acquisition and accurate aiming in the dark. TG231G1 Glock ® 17/17L, 19/19X, 22, 23, 24, 26, 27, 33, 34, 35, 39, & 45 (Excludes M.O.S.™ models)TruGlo Tritium Handgun Night Sights for Glock 17 19 22-24 26 27 Green - TG231G1 TRITIUM night sights are a popular choice among firearm owners, particularly those who value reliability and low-light performance in their sights. It's important to note that tritium has a finite half-life, and over time, its glow may diminish. Therefore, it's recommended to periodically check and replace TRITIUM night sights to ensure their effectiveness, especially in critical situations where visibility is essential. Day and Night Visibility: TRITIUM night sights offer visibility in both daylight and low-light or nighttime conditions. During the day, they function like standard white dot sights. However, when the light diminishes or goes out entirely, they transition to glowing green dots for enhanced visibility. Tritium Illumination: These sights are illuminated using tritium, a radioactive isotope of hydrogen. Tritium emits a faint glow in the dark due to its radioactive decay process. This means that TRITIUM night sights do not require batteries or external light sources to charge them up. They continue to emit their glow consistently without any user intervention. No Need for Charging: Unlike some other night sights that rely on external light sources to charge luminous materials, TRITIUM sights are always ready. They do not require exposure to light to activate the illumination, making them a reliable choice for low-light or emergency situations. Glowing Green Dots: Tritium typically emits a greenish glow, which is easy for the human eye to detect in low-light conditions. This makes it suitable for quick target acquisition and accurate aiming in the dark. TG231G1 Glock ® 17/17L, 19/19X, 22, 23, 24, 26, 27, 33, 34, 35, 39, & 45 (Excludes M.O.S.™ models)