FutureMarine - I have a NORINCO M14 S/A, that is mostly USGI, after installing USGI parts throughout. The only parts remaining Chinese are the receiver, barrel, Operating Rod Guide, and Gas Cylinder Assembly. I have a N/M barrel and a USGI gas cylinder assembly to put on it, whenever I feel like it.
I changed out the, Stock, Bolt, Trigger Group, Front and Rear Sights, Operating Rod, Operating Rod Spring, Operating Rod Spring Guide, and because I am in California, I removed the Flash Suppressor, and replaced it with a Smith Enterprises Muzzle Brake. This one had a USGI type Flash Suppressor, not the solid one that so many people talk about. I have only seen one of the solid ones, at a gun show.
It shoots very well considering it is loose and sloppy all over, except that the headspace is just what it is supposed to be, the rear sight holds all settings. A friend of mine used it one time in a local match, and on the NRA/CMP 200 yard course, he fired 459/500, which is Expert, not too bad considering the rifle.
I had another one, but sold it because I didn't want it. While it was 100% Chinese, it also shot well, but not quite as well as the one I kept.
Smith Enterprises and Fulton Armory both have standard practices where they make the Chinese M14 S/A's into match rifles, for a price. The receivers are as good as the real USGI M14, or these two companies would not perform the rebuild.