AmeriGlo GL241: Fits: Glock Gen 1-4 17,19,22,23,24,26,27,33,34,35,37,38,39. The Ameriglo Spartan series is built upon the classic, 3-dot design, providing a variety of outline combinations designed for highly visible sight pictures in any lighting condition, including darkness. A green tritium lamp with a white, ProGlo orange or LumiGreen outline offers accuracy from the front sight, while two tritium lamps (with white or black outlines) offer precision from the rear sight.