There is a little confusion here about the modern versions of the Mig-21 and i want to clarify it... There were several modernisation packages made by different producers, all of them having nothing in common to each other. More exactly 3 different versions, 2 of them made by israelis and 1 by the russians. The israelis had the Lancers(derived from MFs and made by Elbit, implemented on romanian migs only) and the Mig-21 2000(derived from the Bis, made by IAI and not adopted by any air force in the world). The russians had the Mig-21-93, derived by the Bis and implemented on the indian migs under the name of Bison. Now, i'm not very sure if the Bison doesn't have some israeli pods too, from the IAI's mig-21 2000, but in proportion of 95% it is definitely russian's mig-21-93.