A large group of around 75 birch M14icon NM stocks were sold at auction by Rock Island in the early 1990's. I was able to buy a few for $25 each ( I still have one).
These birch stocks are the same profile as the issue M14 stock - but they are milled/routed around the rear tang and front areas. On the bottom, the stock is routed in the back for the trigger guard plus a small area to the rear of the magazine. The routed areas are 1/8 inch wide and are not bedded.

The front sling swivel is welded at the rear of the swivel support.