Shotguns are ineffective against drones more than 100ish yards away. ISR drones commonly work well beyond this distance. Shotguns are also ineffective against FPV drones because their high speed demands marksmanship and fast reflexes in order to hit them. Shotguns don’t work against any of them in the dark because you can’t see them.
So the take-a-way here is that we need to shrink Patriot Batteries down to fit in a backpack and make 100,000 units so we an assign them at the platoon level.