That's interesting, I couldn't even get the Norinco magazine to lock into place. The magazine I tried was taken directly from the magazine well of a Norinco M4 type rifle. Maybe there are some dimensional differences in Norinco AR-15 magazines? Hard to say. But, it's good to hear that Norinco magazines may fit/function. Just to confirm, magazines will fit the same in both 1st and 2nd generation adapters.
Thanks,
Dan