ZEV Technologies ZEV Combat Rear Night Sight w/ Tritium Black. At ZEV we strive to create the best quality sights for most Glock models. The ZEV front sight is slimmer than a standard factory sight. The sight takes less time to install than it does to remove the factory front sight. The front sight is held in place with a standard 1/4" head machine screw like most Glock front sights this allows the use of the same factory Glock tool for removal of the existing front. Installation of the ZEV front takes 10-15 minutes. Specifications for ZEV Technologies ZEV Combat Rear Night Sight w/ Tritium: Manufacturer: ZEV Technologies Gun Make: Glock ZEV Technologies Gun Model: ZEV Technologies OZ9 Color: Black Front Sight Color: Tritium Gun Type: Pistol Front Blade Height: .215 in Illumination Type: Tritium Features of ZEV Technologies REAR SIGHT KIT - BLACK TRITIUM: Clean Serrated Post For A Glare Free Sight Picture Improved Accuracy Due To Ease Of Target Transition And Acquisition Notch Width Of .140 CNC-Machined Stainless Steel Construction Black DLC Coated For Hardness And Resistance To Wear Package Contents: ZEV Technologies ZEV Combat Rear Night Sight w/ Tritium ZEV Technologies SIGHT.K-RR-COM3-NS-B: ZEV Combat Rear Night Sight w/ Tritium Black