Ok so in the movie we all remember Egon walking down the hall with the PKE meter poking the guy. He has his Proton gun hanging at his side rather than on his pack. I am sure we all have tried to put the gun back on the pack on our backs and it is damn near impossible. So how exactly did he attach it? The key rings on the belt key ring things are too big for the dixie cup brakets (maybe they fit the more accurate ones Namebrand puts out?) But I was wondering if any knows if it is just a ring or if he had a special piece of hardware on his belt or what. Also if anyone has a clear pic that would be great.
There was a simple wire hook on some guns, look at the reference section here…

Awesome Pic, Exoray!