(Combat)
Your mastery makes the most of your armor.
Prerequisites
Armor Focus, base attack bonus +6, proficiency with selected armor.
Benefit
The armor check penalty of the selected armor decreases by 1 (to a minimum of 0). You also use your character level in place of your base attack bonus for the purpose of armor mastery feat prerequisites.
Special
You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a new type of armor.