This flyable mod adds the MiG-21SM and MiG-21MF to the current MiG-21Bis module. While some parts have not been changed like avionics, the following characterics have been modified : weights, fuel storage, engine thrust, payloads.

To work properly this mod needs : MiG-21Bis + JSGME

MiG-21SM : Specifically designed for Soviet air force, the MiG-21SM entered into service in 1969 as an improved MiG-21S with R13-300 engine. It is one of the first variants equipped with an internal GSh23 cannon.

MiG-21MF : designed from MiG-21SM for export purposes the MiG-21MF was the most modern variant in service during Kippur war and Vietnam war (from 1970 to the end). It has flown in many countries like East Germany, Poland, Czechoslovakia, Egypt, Irak, Syria, Vietnam, North Korea and Cuba.

MiG-21Bis : Considered as the most modern Soviet variant, the MiG-21Bis entered into service in 1972 and has been sold to many countries. Designed for fighter-bomber missions, it features the new R25-300 engine and is able to carry an enhanced variety of weapons compared to its predecessors.