The first batch of MiG-31 aircraft delivered this year was repaired and modernized, Rostec told TASS.

The MiG-31 aircraft is a Soviet, now Russian, two-seat long-range supersonic interceptor. It was the first Soviet fourth-generation fighter.

MiG-31’s first flight was made on September 16, 1975; it entered service on May 6, 1981, and was produced at the Sokol aircraft plant between 1975 and 1994. More than 500 aircraft have been built.

At present, the Russian and Kazakh armed forces use those aircraft.

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