Not sure if are saying Trijicon but if so.....
From their Site:
"The vast majority of Trijicon products, including ACOG®, VCOG®, RMR®, RMR®cc SRO®, MRO®, Iron Sights, MGRS®, CCAS®, Thermal Optics, Mounts, and Archery Sights are designed, engineered, machined, and assembled at our...