The GLK002014OGZ from Night Fision is made using an injection molding process and military-grade polymer, coupled with resilient polymer tritium outlines. It is designed to provide maximum flexibility and unparalleled daytime visibility. All components of Night Fision products are manufactured exclusively in the United States, with the exception of the Swiss-imported tritium vials. The Perfect Dot night sight set features a square front green tritium with an orange outline and a blank u-notch rear. It is specifically designed to be compatible with Glock models 20/21/29/30/36/40/41, including S and SF variants. Experience unrivalled visibility and performance with the Night Fision GLK002014OGZ.