The Night Fision SPR226003YGZ employs an injection molding technique and uses a military-grade polymer, complemented by reliable polymer tritium outlines. This design approach guarantees versatility and second-to-none visibility during the day. Apart from the tritium vials obtained from Switzerland, all other components of the Night Fision products are made entirely in the USA.This Perfect Dot night sight set showcases a square front green tritium with a yellow outline, paired with a square black rear. It is specifically designed for compatibility with Springfield XD/XD(M)/XD Mod 2 models.