Garand...stupid question

[chris in va]

What is the other sling swivel toward the front of the barrel for?

[Drummer101]

+1

I dont know either...

[Rob228]

Isn't it called a stacking swivel? If that is the case... pulled this off of dictionary.com

–noun
a metal swivel attached to the stock of a military rifle for use in hooking three rifles together to form a stack.

[T. O'Heir]

It's a stacking swivel. This silly actor will show you how they were used.
http://www.history.com/videos/stacking-swivels-keep-guns-clean#stacking-swivels-keep-guns-clean

[HiBC]

They unstack easily.Hole digging ,etc is sometimes best done with two hands.Stacked weapons are not laying in mud,sand,etc or leaning semi-secure against a tree.