The TruGlo Tritium Pro Low Set Sight is designed for the discerning shooter seeking advanced visibility and accuracy. This exceptional open sight is fitted with TRITIUM PRO technology, which offers glowing visibility in all lighting conditions, without the need for batteries or light charging. The FOCUS LOCK ring is a key feature, enhancing front sight focus for faster target acquisition. An angled rear sight edge further allows for emergency one-hand slide operation. With a compact profile that maintains factory sight radius and holster compatibility, this sight is perfect for Glock M.O.S. series users. Swiss tritium ensures maximum brightness in low light, while white dot sights transition to green illumination in darkness. Experience reliable, high-quality performance with this USA-assembled sight.