I think the idea would be a Stinger mount. All you would need to do to avoid a gun is stay at altitude. Given modern optics you could stay out of a gun’s range.
I have to think this s—t is just for show. The kinds of countermeasures a drone swarm can develop would easily defeat those systems.
I would be designing ways of attacking those drone swarms which are completely different and would just require WWII technology.