But with all the monk / unarmed vs armed / gauntlet vs spiked gauntlet I was afraid I might have missed something and brass k's only allow you to do lethal with fists rather than counting as armed for the aoo rules.
They redacted the whole "armed unarmed strike" aspect of Gauntlets and Brass Knuckles; they're now light weapons in their own right with the special property that they can't be disarmed.