Both Drone Mounted and Vehicle Mounted weapons count as being a sturdy platform where the mass of the vehicle or drone get to absorb the bulk of the recoil (where Body rating count as Recoil Compensation).
Firing Drone Mounted weapons are typically resolved with Gunnery + Agility [Accuracy] while firing Vehicle Mounted weapons via remote operations are typically resolved with Gunnery + Logic [Accuracy].
But, depending on your reading, a Drone that is
Wielding a weapon (rather than having a
Mounted weapon) use regular Recoil Compensation rules. Which is +1 whenever you start shooting (but not if you are continuing shooting) +(Strength / 3) (round up, use the Strength of the Drone even if the Rigger is jumped in) + Recoil Compensation of the weapon and applicable accessories.
While being jumped into a drone that is
Wielding a weapon (rather than firing a
Mounted weapon) seem to be resolved with Weapon Skill + Agility [Accuracy].
Could you give me the rule pages? Thanks ^^
SR5 p. 175
SR5 p. 176