 The Argentine Marine Corps, a branch of the Argentine Navy, has replaced the FN/FM FAL in front line units, adopting the U.S. M16A2.The Argentine Army has expressed its desire to acquire at least 1,500 new rifles chambered for the 5.56×45mm NATO SS109/U.S.M855 (.223 Remington) cartridge, to be used primarily by its peacekeeping troops on overseas deployments.