Improved Buckler Defense
(Complete Warrior, page 100, DnD 3.5)
[General, Fighter Bonus Feat]
You can attack with an off-hand weapon while retaining a buckler's shield bonus to your Armor Class.
Prerequisite
Shield Proficiency
Benefit
When you attack with a weapon in your off hand, you may still apply your buckler's shield bonus to your Armor Class.
Special
A fighter may select Improved Buckler Defense as one of his fighter bonus feats.
Normal
Without this feat, a character wielding a buckler who attacks with an off-hand weapon loses the buckler's shield bonus to AC until his or her next turn.