Lessis more, go with the leather!The leather one for the G3 is nice & economical.
The nylon 'multipurpose' one is a bit more $, and is rather complex.
I don't find it very useful in it's original form and discard the double buckle & extra piece, leaving a simple sling out of it.
That sling is Out of Stock and just like the "New Condition" part number likely to remain so forever.
A standard 2-point sling will work for hunting and simple movement during SHTF. For tactical movement during SHTF then you should look to a 3-point sling to allow the weapon to be carried at the ready.hunting and or shtf on the move