Hershel is the resident 1922 expert and covered that quite well. I really like the 1922 and 1922 M1 rifles much better than the M2. By time the M2 came along there was a pretty significant drop in the quality of the rifles. I believe the knurled head on the M2 firing pin was just to make it more like the 03. I think it would look much better if they'd a shaped it like the 03.
Back to the original topic. I cleaned up the stock a bit with some oil and light application of 0000 steel wool in the darker areas near the butt and it cleaned up quite nicely. The forward sling swivel screws into a lug attached to the barrel that has been inlet into the stock. Common practice at the time was to anchor the barrel somehow to the forend. Shelhamer generally used a little brass ashutzen (or however it is spelled) to accomplish this, but must have figured the swivel would suffice on this rifle.
John
