Improved Precise Shot [General]
Your ranged attacks can ignore the effects of cover or concealment.
Benefit: You ranged attacks ignore the AC bonus granted to targets by anything less than total cover, and the miss chance granted to targets by anything less than total concealment. Total cover and total concealment provide their normal benefits against your ranged attacks.
In addition, when you shoot or thrown ranged weapons at a grappling opponent, you automatically strike at the opponent you have chosen.
Normal: See pages 150-152 for rules on the effects of cover and concealment. Without this feat, a character who shootsor throws a ranged weapon at a target involved in a grapple must roll randomly to see which character the attack strikes.
Special: A fighter may select Improved Precise Shot as one of his fighter bonus feats (see page 38).
An 11th-level ranger who has chosen the archery combat style is treated as having the Improved Precise Shot, even if he does not have the prerequisites for it, but only when he is wearing light or no armour (see page 48).
Source: Player's Handbook