I got mine last week. I too am not impressed with the black paint that chips off the receiver under the the safety lever. Leaves a very obvious streak of bare metal in an arc under the lever. The Czech-made CSA Vz.61 Skorpion does not have this problem. It has a lighter grey matte finish on its receiver, looks like parkerizing to me, and seems durable and doesn't scratch like the Zastava. The safety's much smoother to operate too on the CSA. Doesn't scratch the finish at all, at least on mine.
Also, I thought the wood grips were going to be NEW stock. I bought 2, one for each Skorpion. One of them has nicks and dings in the wood like they've been knocked around a bit and are possibly surplus/used? Or maybe it's just sloppy, inconsiderate rough handling of them and along the way people didn't care if they got dinged or not. Either way, I'm a just a bit disappointed at that, as I was expecting everything in as-new condition.
Otherwise the Zastava M84 looks pretty decent and is a relatively good deal, considering the extra mags, holster and pouch you get with it. Not bad for the money. But fit and finish quality-wise, I prefer the Czech CSA version. Just sayin'.
If Zastava put a better, more durable quality finish on their receiver, and made the function of the safety lever slick and crisp so it didn't drag and scratch the finish off, then they'd be nearly on par with the Czech product.
Incidentally, I've never seen one yet, but I wonder what the quality of the original CZ version (not the recent CSA ones) was like? How did it stack up against the CSA? I imagine as good, but that's a guess. Maybe someone who knows can chime in.