I have a 2007 Norinco M14 with the chew wood stock. Not impressed with the stock. I was looking at the polytech with the black synthetic stock. Are the Polytech stocks much of an upgrade? I know a lot of guys were puting the USGI stocks on the Norincos. Not sure if I want to go that route or not. Is it worth getting the Polytech instead of the norinco?