Close-quarters Fighting

From WinterWiki

Close-quarters Fighting

[General]

You are skilled at fighting at very close range and in evading grappling attempts.

Prerequisite: Base attack bonus +3.

Benefit: You can make an attack of opportunity when someone tries to grapple you, provided that you are not flat-footed or already grappled, even if the attacker has the improved grab ability. Any damage you deal with your attack of opportunity applies as a bonus to the ensuing grapple check you make to avoid becoming grappled. This feat does not grant you an additional attack of opportunity in a round, so the feat does not help you if you have no attacks of opportunity available.

Normal: A creature with the improved grab ability does not provoke an attack of opportunity when beginning a grapple.

Sources: Complete Warrior, Draconomicon, Races of Faerûn, Sword and Fist