sentences:  An improved M73E1 was eventually developed in 1970 with a simplified ejection system, being type classified as the "Machine Gun, 7.62-MM, M73A1".In 1972, it was decided that this weapon was sufficiently different from its predecessor and was redesignated "Machine Gun, 7.62-MM, M219".These weapons were eventually replaced by the M60E2 and M240 machine gun, and vehicles still in service using the M73 series were refitted with these weapons.