AmeriGlo brings a clear advantage to your shooting experience on and off the range. AmeriGlo Optic Compatible Sight sets provide a precise, elevated co-witness sight picture for slide-mounted red dot optics and suppressors and serve as reliable back-up sights. This XL Tall model has a green tritium front sight with white outline and green tritium rear sight with white outline and black finish. It is compatible with all Glock Gen 1-5 models except: 42,43,43X & 48. Fits Glock MOS slide. Compatible with Aimpoint Acro, Holosun 509T, Steiner MPS footprints.