I have fitted it on my x39, and it fit without a hitch. I don't know if you'll have to do any work to the front trunnion or not. Try putting an AR mag in the gun as it is now. Will it fit tightly against the magrails, or does it hit the front trunnion first? If it hits the trunnion you'll have to enlarge the gap in the trunnion so the mags will fit to use the adapter. Most of the time on almost any standard .223 AK receiver, if the AR mag will fit in the magwell all the way, it will work.
I don't have a .223 Norinco yet. I have tried it on my x 39 Norinco and it fits perfectly, so I'm sure it will fit a .223.