We do not currently know of any adverbs for armaments.
Using available adjectives, one could potentially construct nonstandard adverbs such as armaturedly, armaturelessly, armedly, armiferously, armisonantly, armoredly, armorlessly, armorlikely, armouredly, armourlessly, armourlikely, armylessly, armylikely, armoringly or armouringly.
Note, however, that these words will not generally be contained within standard English language lexicons.