No! Love me a ring airfoil. Went to aerospace school (did wind tunnel and water tunnel work before that even, but didn't end up with a degree) so a huge nerd for some of this and totally missed this specific insanity.
I wonder if they work? I mean, are they weighted properly to have circulation control so they fly and go in straight lines or is this some silly terminal ballistics thing (cut a hole in them?) or... what?
Agree, if you ever find some laying around at a gun show, save one for me!