It seems to be real, it’s from mechanism who’s a company that sells various mounting accessories. They all use interchangable quick connections, so you can use them for ridiculous combinations like this.
The chest strap for example is meant to be used like this:
But you can also remove the mount and connect the deck directly to your chest with it.
bjoern_tantau@swg-empire.de 3 days ago
As if people are incapable of making silly pictures.