Developed for the Hessian Police in Germany by Blackhawk, this Rotating Belt Loop allows the wearer to drop the holster out of the way of body armor, yet not have to remove the holster and reposition it, when seated in a vehicle.
This is thanks to two rotating joints which move with the pull of a single lever. Below, you can see it mounted to a belt.
The next two images show it in use.
As you can see, the pistol remains accessible, forward of seatbelts.
The Rotating Belt Loop will work with a variety of holster.