AI doesn't leave static weapon if that weapon has no ammo.
A static gunner without ammo - does not make sense. It's just an easy target for the enemy.
Please fix and make the AI always leave a static weapon if it has no ammo, an example of how the AI leaves a damaged vehicle, that is not able to move - in A3 it works!
From this it is even more unclear - why the AI does not leave static weapons no longer able to shoot.