Fits Glock Gen 1-5 9mm/.40/.380, Gen5 10mm/.45 magenta dot glow in the dark night sights (no tritium) Rear Sight - Aperture Style Green phosphor excellent for low light or completely dark situations charges and brightens with exposure to normal daylight operates under all weather conditions standard 6.5mm rear rail front sight includes very robust fastener Features Ghost Ring aperture-style rear sight that focuses shooter`s eye to front post Design is ideal for aging eyes or people who have trouble aligning traditional iron sights