Meprolight 10224O: Meprolight Tru-Dot night sights feature unequaled low-light performance as the brightest night sights available. They are trusted by military and law enforcement. This fixed set features self-illuminated green Tritium front in a 3-dot configuration with an orange rear. This model is meant for use on Glock 9mm, .357 Sig, .40 S&w, and .45 GAP caliber pistols - model: G17, 19, 22, 23, 31, 32, 33, 34, 35, 37, 38, and 39.