The Mig-31 'Foxhound' was developed as the replacement of the Mig-25 'Foxbat',the prototype Ye-155MP took the first flight on 16 September 1975.As the heaviest fighter/interceptor in the world,the Mig-31 is much heaver than other similar aircrafts.At the same time,tow powerful D-30-F6 engines and a stronger airframe gave it a top speed to Mach 2.8 at high-altitude and Mach 1.23 at low-altitude.

In order to apply the lastest ultra-long-range AAMs,the Mikoyan OKB started to develop a new version which named as the Mig-31M under the joint directive issued of the Communist Party Central Committee and the Council of Ministers.The new design applied made the Mig-31M can be easily distinguished from other versions.7 prototypes were complet-ed.However,the program were canceled after the break-up of the Soviet Union.