Hey Kahuna!
Thanks for buying this module!
Anti Armor is a property that already exists in Mothership. The smart rifle from the PSG has AA which means anti armor. It gives the weapon the ability to destroy armor on contact, doesnt matter if the damage is less than the armor points, anti armor will always shatter armor unless the armor has damage reduction and the damage reduction absorbs the damage done.
Check the official Mothership Player Survival Guide for more details!