In Dark Heresy and Only War, it is stated that armour that provides 7 AP and more inflicts a -30 penalty on Move Silently/Concealment/Stealth tests.
Two questions:
I can't find this rule in Black Crusade. Does it simply not count for heretics?
If the rule does count, (and of course in other games where it definitley does.) if I take a suit of Carapace (6 AP) and make it Best quality, does it suddenly become less stealthy?