The AGM-75A missile had Mach 6 capability and later on - with a new 'suit of clothes' became the U.S. Navy Phoenix Missile (AIM-54A).
The AGM-76A was an air-to-ground missile designed as a quick response to the SAM threat in Viet Nam, utilizing the GAR-9 body and rocket engine, and was for use with The "Wild Weasel/Iron Hand" program. It carried a 250# low drag series bomb as a warhead.