The Lovely Harvey bought me a bottle opener made out of a .50 BMG round.
Marv expressed enough interest in it that she bought him one too.
Except... The vendor she bought mine from was out. So I found her a link to a different vendor.
It arrived today. It's a bottle opener made from a .50 round alright. 12.7x108mm instead of 12.7x99mm...
Russian brass!
Kind of neat, actually.