Trijicon, Inc. (/ˈtrɪdʒ.ɪ.kɒn/ TRIJ-ih-kon) is an American manufacturing company based in Wixom, Michigan, that designs and distributes sighting devices for firearms including pistols, rifles and shotguns.

[1][2][3] Additionally, Trijicon is a contractor for the United States military and supplies the Advanced Combat Optical Gunsight (ACOG) and RX01 reflex sights.

Additionally, the "iji" in Trijicon mimics the "three-dot" design of the Bright & Tough Night Sights that were being manufactured when the company was renamed in 1985.

[2] Trijicon introduced a tritium-illuminated telescopic sight for the US Military called the TA01 4x32 Advanced Combat Optical Gunsight (ACOG) in 1987.

[8] On January 18, 2010, ABC News reported that Trijicon was placing references to Biblical verses on the side of the ACOG sights sold to the United States military.