Alice pack LC-2 waist strap lower back pad
This one is a military surplus buy out this is for the pad only no straps there are several available each or missing one of the metal adjuster bars
8465-01-075-8164
The one in the picture might not be the one that you get they are all the same style DLA numbers vary
Please see pictures for better details
Please be sure to check out my other listings for more military surplus items