МиГ-21ПФС, ПФМ

[sovietjet]

Thanks.

And what about MiG-21PFM 76 and 77?

76 is 940МИ12
77 is 940АЧ13

At some point it was considered that PFM 51, 61, 77 and MiG-21US 02 were sold to Nigeria but it seems this never happened.