no, the norinco is NOT prohibited; or even restricted; only those manufacturers that are listed that produced the actual "u.s.. rifle, m14" , ie springfield( the government armory, not the private company) harrington /richardson, winchester, and trw- this is supposedly b/c they are converted automatics; the m1a by springfield( the private company) and the norcs/polys/lrbs are maunfactured as semi automatics right from the factory: it can be argued that the m14 was NEVER a full automatic until you added the "kit" but our stupid government followed the us batf in declaring it to be a full automatic
but it's pointless ; been all the way to the scoc and they rejected the argument- however, you can harvest everything but the receiver, but be aware that some parts will require "fitting" to your chinese/aftermarket receiver- it's NOT just a drop in and go