Reflector sphere

The reflector sphere is 2 thin metal plates that orbit a specific baloon that it has been randomly assigned to, upon contact with these plates most projectiles bounce off and continue with their path in that direction, still capable of hitting and dealing damage to other things.

On the other hand, certain explosives will explode and deal damage to the actual balloon.

And if a shot gets in between the plates it will hit the baloon as normal, and larger balloons will have larger gaps as the sphere stays the same size at all time.

After taking a beating equal to 30% the baloons health (20% if the baloon is a moab-class or higher) the sphere will break, however each of the 2 panels have seperate health, so even if you do the damage you still have to bring down the other panel.

V2
There is a v2 version which is very simular but it is slightly wider, has 5% extra health and there are 3 panels.

However this is fortunately vastly less common.