To me this drone only makes sense as an assassin’s weapon.
The drone only carries 100 rounds. Not enough for tactical operations
The speed and range also are not enough for tactical purposes.
But for targeted assassination it would be effective. The assassin could get close enough for the drone to fly in to a compound and unload its magazine in to the target. If the drone is lost it is of little consequence.
The article does not state the caliber of the weapon. But if it is 0.223 or larger a smaller caliber would be sufficient for assassination and may boost the chance of mission success.
As integrated air support for a squad or platoon, it would work. Send it out to scout for the enemy, engage whoever it finds, then fly back to the platoon for resupply.
I could also see outfitting an armored unit with a few. It sits on top of a charging station on the vehicle, and gets sent out to check for IEDs and anti tank missile units, engaging whatever it finds.
My thoughts as well. Single-shot .22 short or better yet a small explosive charge (like 1/8 or 1/4 ounce HE). A quick get up close and personal, then self-destruct on command - an air-borne suicide bomber.
A YouTube demo HERE of formation flying - thought it was neat when they went through a "window" (at 1:08) - first thought was the above scenario.