The GLK001015YGZ by Night Fision is a product of superior manufacturing techniques. This makes uses of an injection molded process, as well as the utilization of military-grade polymer and robust polymer tritium outlines. These features provide the product with both flexibility and unparalleled daylight visibility. The tritium vials that feature in this model are an exception, as they are imported directly from Switzerland. With that aside, all other components of Night Fision\'s products are carefully crafted from beginning to end in the USA, revealing the brand\'s commitment to domestic production and quality assurance.