Cazalet old chap:
Russia would have to set up an entirely parallel air defence system from scratch to defend Syria from NATO aggression. Simply can't be done, old boy.
Good enough to shoot down a Turkish F4 earlier this year.
https://en.wikipedia.org/wiki/June_2...rkish_aircraft
The Aviationist » Russian Su-30SM, Su-24 violate Turkish airspace. Flanker locks on TuAF F-16 for +5 minutes
Looks like Syria have integrated the Russians quite successfully and we do not really know what equipment the Russians have with them, add in a couple of batteries of S400s to the Syrian S300s you have a pretty sophisticated system.