Charlie,
That picture was taken by my (now deceased) father-in-law in Alaska in 1950.
US Army was involved in a rail & road building project.
I have a few pictures of the tour but only two show M1-Carbines. Both pictures show carbines that had escaped a later rebuild.
And the fellow above is on Bear watch!
Here's the other pic.
https://www.milsurps.com/images/impo...aska1950-1.jpg
Phil