In part 3 of the defence scenario, where you have the punisher with the extra spawns etc,
your team has flak cannons.
However, they seem to deal 0 damage to enemies.
We watched enemy commander (not the punisher, just a commander) sit still and take about 40+ direct hits from those. Didn’t even lose 1 pip of shields.
So either they all do under 100 damage (totally useless) or they’re meant to do more but are doing nothing.