AmeriGlo Combative Application Pistol Sight for Glock 17,19,22,23,24,26,27,33,34,35,37,38,39, Green/Green, Green Tritium Front Sight with Lumi Outline, Rear Sight Lumi Horizontal Line in Center GL-614 AmeriGlo CAP (Combat Application Pistol) sets allow the shooter to align a highly visible front post with a brightly colored horizontal paint bar on the rear sight for rapid target acquisition. Point of impact is the A-Box at 15 yards when any portion of the front sight is visible in the rear notch" allowing for rapid sight alignment.