I suspect a big drone could carry a one shot recoilless weapon I suspect with modern tech you could get the weight down to say > 10Kg You can get drones that c

I suspect a big drone could carry a one shot recoilless weapon I suspect with modern tech you could get the weight down to say > 10Kg You can get drones that can carry over 40Lb an that's not far off a ww2 57MM M18's weight.