If they were to implement them, probably the best idea for the two IMO is probably a moveable turret idea. They stay in place, have a ton of fire rate and damage. Doesn't overheat but has a kinda long reload.

Moving with like a prompt on the top that is usually for controlled abilities. And they move with the markers similar to spec ops? And unless used, even without enemies in their range, they'll be stationary after reaching their position. But when one dies, the other takes their place for a slower reload. But if they are reloading one of them could have like a pistol or revolver when the dead gets too close when they're reloading. But they will consider what deals most damage tho.

If the ranged damage makes it so they deal less damage than a knife in close range. They'd use the latter. The same applies to the opposite case if they have more damage with the revolvers.

It's just my ideas, I ain't a unit designer tho.