Web Rifle Case ?

[mr.e moose]

And here we go again...

It is a honest question on what the pouch was for.I asked my 98 year old father in law what it was for and he said I haven't a clue I was in artillery.My tongue in cheek comment was about the fact that as the members of that time depart we lose the knowledge that they had.Kind of like what did this caveman use this rock for?