Ameriglo Night Sight Set - Pro I-Dot Style - Green w/ ProGlo Orange Outline Front / Single Green Rear - Fits For Glocks 17. This Night Sight from the professional product engineers at Ameri-Glo has a .180in rear notch that extends to end of slide and has an under-cut face to eliminate glare. The AmeriGlo I-Dot Front and Rear Night Sight for Glocks is made with a Swiss tritium light source that is guaranteed to be incredibly bright and effective for up to 20 years without dimming or fading. The bar stock steel on this Ameriglo Gun Sight will last you an incredibly long time thanks to it's high levels of durability. For a great way to make sure your night shoots are more than successful choose the Ameri-Glo Glock Handgun Tritium Illuminated I-Dot Complete Night Sight Set. GL-201: Ameriglo Complete Night Sight Set - Pro I Dot Style Green Front w/ ProGlo Orange Outline Front Single Green Rear Fits Glocks 17192223242627333435373839 Specifications for AmeriGlo I-Dot Night Sight - Green Tritium Glock Pistols: For: Various Glock Models Material: Bar Stock Steel Illumination: Tritium Front Sight Color: Green w/ White Outline Features of Ameriglo I Dot Illuminated Tritium Glock Sidearm Weapon Night Sight: Durable Lightweight Easy to use Ideal for night shooting Package Contents: Ameriglo I-Dot Illuimated Green Tritium Glock Pistol Night Sight Front and Rear Set GL-201: Ameriglo Complete Night Sight Set - Pro I Dot Style Green Front w/ ProGlo Orange Outline Front Single Green Rear Fits Glocks 17192223242627333435373839