The creation of a promising Russian interceptor based on the Su-57 will not allow for the full reproduction of the capabilities of a specialized aircraft of the MiG-31 class. This was stated to "Pervyy Tekhnicheskiy" by Nikolay Chikunov, a Category I design engineer at the A.I. Mikoyan Design Bureau.

According to him, the design of the existing fifth-generation fighter was not initially intended to meet the full set of requirements for a long-range high-altitude interceptor.

It is impossible to create an effective interceptor comparable in efficiency to the MiG-31. Neither the design, nor the engine capabilities, nor what can be packed into it in terms of combat load, including internal placement.
Nikolay Chikunov, Category I Design Engineer

Chikunov added that the creation of a full-fledged successor to the MiG-31 will require the development of a specialized platform.

The MiG-41's younger brother, the MiG-31, is armed with the Kh-47M2 "Kinzhal" hypersonic aeroballistic missile, a 23 mm six-barrel cannon, aerial bombs, and various types of air-to-surface and air-to-air missiles.

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