Drone too light to handle spinal weapon?

So recently i was experimenting with drone by decreasing their weight and cost while increasing the firepower.

It seems however, that reducing the drone weight has caused substantial decrease in firepower despite increased number of gun due to lesser weight to absorb and handle the recoil.

The tiny drone ended up wobbling around while unable to aim the main gun.

I guess there's a reason why the stock stinger drone weighs 10 tons after all...