I have a stock Norinco except the mag. I added a fixed 20 rounder made by Norinco. No issues whatsoever. I kept the 10 rounder though jiust ion case.
The Norinco has chrome chamber and bore. Most of the eastern Europeans do not. That's a big deal to me since I have a ton of corrosive ammo squirrelled away.
And I looked, and behold a pale horse: and his name that sat on him was Death, and Hell followed with him. And power was given unto them over the fourth part of the earth, to kill with sword, and with hunger, and with death, and with the beasts of the earth.