The MiG-31 (NATO - Foxhound) is a two-seater long-range supersonic interceptor-fighter developed in the 1970s. The MiG-31 set several world records by reaching an altitude of 37,650 meters (123,523 ft) in 1977 as well as setting a time-to-altitude record of 35,000 meters (114,829 ft) in 4 minutes 11.78 seconds. The Foxhound was equipped with the latest digital avionics that allow it to operate in all weather conditions and was the first Soviet aircraft to have look-down shoot-down capability. The MiG-31 was developed as an interceptor but when Russia developed the Kinzhal hypersonic ballistic missile they needed an aircraft that could carry the missile’s heavy weight so the MiG-31K was developed as an attack aircraft. The normal bomb and missile load of the MiG-31BM was replaced by an adaptation to carry the Kh-47M2 Kinzhal “Dagger” that has a 2,000 km range. Ten of the MiG-31BMs have so far been converted. The 764th Fighter Aviation Regiment is the first front-line MiG-31K operator and is expected to have around 24 MiG-31K aircraft including 31 BLUE RF-92332.