I don't keep track of model numbers of drones and stuff - it's not something that interests me. However I can make a drone in my house with a 3d printer and Arduino and could easily fit it with an open source guidance system, and payload if I felt the urge. The government have far more money + expertise than me, and can easliy do the same thing, and I'm sure they already have the tech and knowledge to do that already.Again, you said "not now we have nukes and drones that can wipe out entire battalions fairly easily" - which missile and cluster-mine carrying drones do we have? How many, with what payload?
There's nothing stopping a plane, missile or some other method of delivery to drop a drone swarm and command them via a master drone/satellite comms on a location identified by satellite to take out a large area with pinpoint accuracy.