You mean a Romanian WASR-10 or 10/63?
Basically a crude single stack AK wallowed out to accept high cap mags.
That said, I have one and it goes bang every time. If it tells you anything, I "broke it in" by cleaning out all the cosmoline with Brake-Kleen, running it without lube until it started slowing down, then cleaning/lubing it. Runs fine.