Originally Posted by
DuncanDoenitz
I don't know about the compatibility of Russian/Western ordnance in general, but Sidewinder/Magic is not an "in general" case.
In the late 1950's, through China, the USSR was able to acquire an early model of AIM-9 Sidewinder. The Soviet Union reverse-engineered this example to produce its own AA-2 Atoll missile; copied to the extent that not only is it compatible with AIM-9 launching hardware but that the individual missile modules are themselves interchangeable.
If Magic was conceived as being backwards compatible with Sidewinder, it follows that a degree of 3-way Atoll/Sidewinder/Magic compatibility has been inherited.
In addition, I would mention that the Sidewinder and the HARM are so different in level of complexity, function and systems integration with the aircraft that it would be much harder to reverse engineer a compatible installation.