Metal disintegrating links

Hi All,
Could someone please be able to ID these metal links for me, what gun & caliber were they used with?
Regards Ozzi.

Since you have no size reference next to links, impossible to ID.
Seems to be a Pull-out belt type, not the more common Push Through Type.
Doc AV

They look similar to Fed Ordnance 9mm links.

These links were holding 2 x 7.62 X 51 rounds together when I first saw them, the 3 tabs holding around the neck of the cart & the larger cylindrical parts around the body of the cart. case.
Thanks for the replies so far. Regards Ozzi.