I suspect the Drone over Dorner is equipped with small arms so that the killing round (wherever it comes from) can be either anonymous or Obama can claim the glory if his political pollsters say it helps or provides credible deniability if they say it won't.
The NCOs are the sensor operators on the two-man drone crews; the trigger-pullers are the pilots. But you are right, they are faceless and nameless. And if they take him out with a Hellfire, they could claim that the explosion was caused by a bullet striking a propane tank.