As was expected, they pretty much immediately found themselves under US weapons embargo. Modern weaponry form integrated systems, and integrating a Russian system in a NATO system is pretty much out of the question for various practical reasons.
The Swedish embargo however was different. Swedish law simply forbids export to countries that use force against civilians. There are plenty of well supported evidence of this taking places, not only in Syria. But all this have to be taken into context to understand the Turkish situation.
Perhaps unfortunately, depending on your perspective, the Swedish embargo was lifted when the NATO negotiations started. That is Realpolitik for you. Nobody wants to risk a Turkey allied with the Eastern block. And Turkey knows perfectly well to take advantage of that. Thus far it seems to be working for Erdogan. The deal maker image gains popularity, which is sorely needed with Turkish economy being what it is. The open question is how far he can push it.
https://www.reuters.com/world/europe/sweden-resumes-arms-exp...