Founded in 1990 for the sole purpose of providing cutting edge optics to the IDF (Israel Defense Forces) Meprolight knows a thing or two about premium-quality firearms accessories. Meprolight's pistol sights are no exception, as they are easy to acquire both day and night. The stark contrast between orange and green not only offers rapid acquisition, but faster follow up shots as well. If you're looking to upgrade your factory Glock sights to night sights, this set from Meprolight is a perfect option. Additional info: - Compatible with G17, 17L, 19, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 34, 35, 37, 38, 39, AND 45 - O RING front sight