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I don't have a Norinco 37 clone, but I do believe that it uses an extended mag tube so it wouldn't fit unless you swapped mag tubes as well, if it'll work at all.
Good question.
Don't know for sure,but if the threading is like the barrel nut of the CQ311/AR15 or 1911 grip screw,I'am thinking "NO".
Anyone know for sure???
That would surprise me. If they are like any other Ithaca design, the barrel will be retained by the barrel nut. The only Norinco I know of with a pinned barrel is the SKS.