Gun club. AR mags. Unload.
And they're being fired at an angle. Pedestrians have gotten killed by such bullets.
It's not straight up and down. Straight up and the bullet reaches 0 fps velocity. Then it descends with only the velocity of gravity until it reaches terminal velocity. Terminal velocity for something with as little mass as a bullet isn't likely to kill.
But a bullet fired at an angle will not reach zero velocity. It's still going to have the force to kill.
Firing at such airborne objects with a rifle is a bad idea.
Climb a high tree. Use an AR-15;D
Surprised one has not been shot down yet
Pitting the gun clubs against the (drone) flying clubs. What could go wrong?