Editing Warhammer 40,000/9th Edition Tactics/Weapons (section)

====Non-numeric Penetration====
*Some weapons/models/other special rules ignore Light Cover or ignore Cover period (which covers Light, Heavy, and Dense, the first 2 of which modify armor saves); when present, a rule like this is not as good as decreasing your AP by 1, but better than not having the rule, in terms of penetration only (ignoring Dense Cover is also helpful but not relevant to penetrating armor).
*Some weapons ignore all armor saves, which is incredibly rare and when present will be a special rule on the weapon or model, rather than represented in the AP column of the weapon profile.  This will, of course, bypass even the saves an AP-6 weapon can't completely ignore.
*Some weapons ignore all ''invulnerable'' saves.  This is not nearly as rare as it should be, but like ignoring all armor saves, will always be present as a special rule rather than listed in the AP column of a weapon profile.