Arsenal page 147
QUOTE
As a general rule, one weapon mount can be added to a vehicle for every 3 points of Body it has, rounded up
Last time I checked.....1/3 Rounded up = 1, So its safe to say that you can put 1 weapon mount on a mini to Medium Drone and 2 Weapon Mounts on a Large Drone. Since 0/3 = 0 you can't put any on Micro drones as it should be.
Now that being said...I would limit Mini-drones to Tasers and Light Pistols and Small Drones Tasers to SMGs and then let the Medium Drones to Large drones mounts have the Tasers to LMGs.