Was there a correct mounting for a sling on the DOE 9mm?
I can't find any vintage photos of them being carried or slung. ETA (not many as who is taking photos at classified DOE facilities?)
I'd think a single point mounting would have been ideal, bot sure if at that time it was a consideration or just left up to the end user to "figure" something out on their own.
On a retro clone there are plenty of aftermarket ways to do this (e.g. rear receiver cover plate with loop) - not sure if anything is close to factory or original intention.
Another idea is use a two point with the carry point on the rear stock as normal and a hook onto the front sight block, enough real estate on it to make it work.
I'd appreciate any retro photos that show one being slung if that exists.