You know I've been wondering this. I hear people pointing to the M1923 as the canvas sling of WW2 and I hear others pointing to slings similar to this:

M1 Garand Sling M14 M1A M16 AR15 Web Sling OD Green Cotton USGI Appleseed Liberty RiflePattern WWII & Korea

Now, being a novice to slings at all........ Which one is WW2 period correct? or are both? or neither?

Just a curious man here trying to learn.