McMillan Firearms is an American arms manufacturer best known for the McMillan Tac-50, its .50 BMG long-range anti-materiel and sniper rifle. It also produces the McMillan Tac-338, McMillan Tac-300 and McMillan Tac-308 sniper rifles, the ALIAS Rifle System and various hunting rifles.
McMillan Firearms is based in Phoenix, Arizona and also has a distribution office in Johannesburg, South Africa. In 2013, it was acquired by Strategic Armory Corps, adding to its hunting and tactical division.