[Suicide Junkie]

If there is any surviving component with the armor ability on a ship, one of them will be hit.
70%-90% of the time, the ones with the fewest hitpoints first.

Once all of the ability-tagged armor is gone internals start getting hit.
Leaky armor is just internals that do nothing fancy, but are cheap, small and have plenty of hitpoints to soak up damage with.

And of course, all that damage they randomly soak up DIDN'T destroy your guns.