Ameriglo’s Combative Action Pistol sights (a. k.a CAP) are designed for personal defense and concealed carry applications. The front sight is composed of a square outline tritium lamp, and the rear sight features a non-tritium LumiGreen line. This configuration promotes the “Cover Point of Impact” aiming style, allowing the shooter to cover their target for faster engagement. Features of the CAP Sights: Front sight: Square outline tritium lamp Rear sight: Non-tritium LumiGreen line “Cover Point of Impact” aiming style Ameriglo T-CAP Green Tritium LumiGreen Sq Outline Front, LumiGreen Line Non-Trit Rear Sight Set for Glock Gen 1-4 17,19,22-24,26,27,33-35,37-39 GL-624