The Meprolight 0202243101 is a top-tier self-illuminated night sight designed for Glock models 17, 19, 20, and 21. Renowned for its combat-proven performance, this sight enhances accuracy in low-light conditions, making it easier to hit both stationary and moving targets. As a direct replacement for standard weapon sights, it requires only minimal modifications for installation. Crafted with superior production techniques and stringent quality control, Meprolight is favored by law enforcement and military professionals alike. With features like maintenance-free operation and integrated day/night functionality, these sights deliver reliability and confidence when it matters most.MEPROLIGHT combat proven self-illuminated night sights enable you to hit stationary or moving targets under low-light conditions with dramatically increased hit probability. Designed as replacement parts for the standard weapon sights, MEPROLIGHTS Self-Illuminated night sights can be mounted directly with minor modifications. Superior production methods and rigid quality control have made MEPROLIGHT the first choice among law enforcement agencies, defense decision makers and major weapon manufacturers.Features :Always Ready When You Need ThemDaytime Confidence Under Low Light ConditionsThe Brightest Night Sights Available TodayTotally Integrated Day/Night SightingMaintenance Free