Looks like a nice rifle, but the stock may be a post-war replacement that someone added. If it was added by a US arsenal it would likely have stamps to indicate that. Does it have any stamps on the left side near the back of the receiver, on the bottom in front of the magazine, or on the bottom near the 'pistol grip' area? The stocks aren't supposed to be shiny. The finish, even if done outside of the arsenal looks just as it should! Congrats on a nice rifle! It's getting harder and harder to find nice examples these days.