It might be out of scope for this mod, but since there's plenty of gun variations and the logistics of it are already figured out, I feel like it wouldn't harm to ask for gun turrets to be implemented.

Emplacement: A stationary support that have a slot for a gun and some ammo. Reduces recoil and increases reload speed, at the cost of being stationary when used.

Automated Turret: A stationary frame that have a slot for a gun and some ammo, can shoot enemies on its own.