AmeriGlo, 4XL Optic Compatible Sight, Night Sights, Green Tritium LumiGreen Outline .385" Front, Flat Black .480" Rear, Fits All Glocks Compatible with all Glock models Green Tritium with Lumigreen outline front/black rear .385" front post/ .480 rear Optic compatible AmeriGlo's 4XL Optic Compatible night sight sets provide an elevated sight picture, able to co-witness with slide-mounted miniature red dot optics and suppressors. These sights measure in with the front post at .385" high and the rear at .480" high, ensuring that the user will be able to accurately use their iron sights in a functional manner.