Sure, but sometimes the bad guys move within minutes, and missiles are terribly expensive. I'm thinking more on a tactical level, like a swarm of super long ra

Sure, but sometimes the bad guys move within minutes, and missiles are terribly expensive. I'm thinking more on a tactical level, like a swarm of super long range, relatively cheap on-demand precision hand grenades that the soldiers wouldn't have to carry, could strike targets at a distance in seconds due to locality, and could fly around corners and through windows if necessary. And the unused drones can potentially be retrieved when the engagement is complete. Of course if the enemy has technological countermeasures to such a thing then it becomes a different issue, but you can say that about any technology.