XS Sights Night Sights for Most Pistols XS Sights - The Fastest Sights in Any Light The XS R3D Night Sight upgrades your Glock with a bright, easy to see, night sight for encounters in any light condition. The highly visible large dots in the front and rear sights form a traditional 3-dot sight picture. Each tritium powered dot glows in the dark. The front sight Ember ring glows in low light to provide maximum visibility in all light levels. This means faster target acquisition in any environment. The Gold Standard Night Sight for Glocks Self-Defense. You don't have time to line up the stock sights in a dangerous situation. Your vision is naturally pulled downrange to the threat. XS R3D Night Sights are designed for this exact situation. Sharp corners distract your sight. The rounded corners in the U-Notch help you focus, allowing for less distracting alignment. Worried about glare? The overhang and anti-reflective tritium lens reduce glare in bright light for greater sight definition, leading to easier targeting. The unique rear sight design also aids in one-handed slide manipulation aiding in faster drawing and firing. In addition, our sights fit in most holsters for concealed carry. Yes, we have thought of and tested for everything.