The story
Trijicon was founded in 1981 by Glyn Bindon as Armson USA, the sole US importer and distributor of the Armson OEG. The Armson OEG was an occluded-type gunsight that used tritium and fiber optics in its construction and was manufactured in South Africa. It was created in 1981 and reached shops in 1983. The gunsight became popular due to its variety of mounting systems for popular rifles and shotguns.
In 1985 Bindon reorganized the company as Trijicon and began manufacture of night sights for pistols. Trijicon introduced a tritium-illuminated telescopic sight for the US Military called the TA01 4x32 Advanced Combat Optical Gunsight (ACOG) in 1987.
From Wikipedia’s article on Trijicon, shared under CC BY-SA 4.0.5