Improve the speed and accuracy of your target acquisition with Trijicon HD Night Sights for your GlockA(R). Front sight has a taller blade and phosphorescent outline that glows in little to no light and lines up quickly with the "U" notch rear sight. Rear sight is also angled with a serrated surface to reduce glare and aid one-hand slide operation. Metal body is manufactured to fit specific GlockA(R) makes and models Tritium-filled glass provides excellent illumination in little to low light Sapphire jewel evenly distributes light and protects against punctures Silicone rubber cushion gives shock-protection to the tritium filled glass Hi-Vis painted front sight resists powder residue to stay bright for years "U" notch rear sight is steeply hooked to assist in one-hand slide operation Aluminum cylinders protect against heavy recoil and harsh cleaning solvents Order today!