ok so being very new to the M-14 scene, I have a question on swapping my Norinco stock with a recently purchased USGI one. when I removed the receiver and barrel from the chinese stock, I noticed that where the receiver sat there was what appeared to be metal reinforcing plates on the stock itself, after looking at the USGI stock, there was no metal inside the stock. the metal reinforcing bits were just in front of where the trigger group sits. my question is. Is this a safety issue? can my USGI stock be trusted? thanks in advance for any feed back. I did a search on CGN and some other M-14 friendly forums and came up dry.