Trinity Arms was a flourishing outer colony weapons manufacturer that produced a wide range of military and civillian rifles, for hunting, proffesional shooting, police and goverment snipers and military sniper rifles. However with them selling weapons openly to the rebels, they faced heavy tariffs and combined with the Human-Covenant war destroying many of their plants, they were almost rendered bankrupt. They could no longer keep up with demands for the SRS99, forcing them to sell the weapon design to Misriah to keep up manufacturing. After the war they recovered, producing new rifle systems that continue to be used in the Necros War.