MiG-31K with Kinzhal, February 2022. Russian Defense Ministry photo.

Production of the Cold War era MiG-31 (NATO reporting name Foxhound) began in 1979, in February 2022 it was used to launch what the Russians call a hypersonic ballistic missile.  MiG-31s converted to carry the ballistic missile are called MiG-31K.

MiG-31BM, Central Military District photo.

Russian Ministry of Defense video, MiG-31K hypersonic ballistic missile ‘Kinzhal’ (dagger) launch, February 2022:

To confuse you, Kinzhal-dagger is also a name applied to other Russian missile systems.

MiG-31K, Russian Defense Ministry photo June 2021.

MiG-31K with Kinzhal, in 2018. Russian Ministry of Defense photo.

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