I take that first photo to mean that the AR pistola things are validated.
Actually it goes back to 1979. Those are Firing Port Weapons. special built to fire from inside a closed up Bradley Fighting Vehicle. where the M-16 was to long to use inside and the Bbl to short to swing much of an arc outside the port.
I Remember hearing about them at the time. I have never seen one before.
The M4 has long rendered the Firing Port Weapon moot.
