I wonder if it can be found in the games files. There really has to be shotguns implemented. I am tired of always using Carbines in Close Quarter Combat, especially when clearing out buildings.

ArmA 4? Grand Theft Auto 4 did it, and that was 2008. It should be possible and I would love to see it ingame.

So do you mean that the units cannot move around properly when they are in/on structures when ordered by Zeus Game Master.