Quote Originally Posted by jmoore View Post
One way to tell if your rifle SHOULD have the swivel is to check whether or not your scope bracket has a S/N on it. If it does (brackets were numbered after WWII), then there should be a swivel. There's other post war mods that will serve as clues as well...
Like center-punched pad screws.

But just a minute - if there were no swivels used during the war, why did they bother to issue the M1907 sling? (I can't be bothered to dig out the books )