These Kalashnikov rifles being referenced are all MAK-90 models. Even a modified true select fire AK-47 (or the AK-74 in 5.45x39) requires a class 3 permit to my understanding. I have owned MAKs from China, Russia, Yugoslavia, and about 3 other eastern bloc countries....Bulgaria is one I recall. Frankly, the best built of any I have seen was the one from Yugoslavia. The Chinese milled models (and even the stamped ones) have never given me any problem.
I have fired military AKs from Russia and Yugoslavia, and the Yugoslavian was definitely easier to handle....I suspect it was a half pound heavier. Out to 200 yards it is accurate enough...after that it starts to be a guessing game. It's certainly not something to shoot at matches, but it's really hard to make one not fire. A couple friends and I used to burn an easy thousand rounds in a short afternoon with the AKs and an SAR-48.
I have owned exactly one AR-15, and I never fired it. I'm not a match shooter.....just never was particularly good with a rifle. In a tussle though, I'd take even the MAK in semi-auto over anything else I've used.....they seem about impossible to jam.