I imagine the use of some sort of shotgun on a drone would be more practical than a machine gun. Easier to hit a target, recoil matters less as youre only taking one shot.
In fact I think the crazy US switchblade drones use a shotgun style warhead for these reasons.
The Iranian drones aren't quadcopters, they're flying wings with a model aircraft petrol engine up front, using a standard propeller. A shot gun would probably do the job.
I imagine the use of some sort of shotgun on a drone would be more practical than a machine gun. Easier to hit a target, recoil matters less as youre only taking one shot.
In fact I think the crazy US switchblade drones use a shotgun style warhead for these reasons.