3e SRD:Weapon Focus
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Weapon Focus [General]
Prerequisite: Proficient with weapon, base attack bonus +1 or higher. The character can choose unarmed strike or grapple for the character's weapon for purposes of this feat. The character can choose ray, in which case the character is especially good with rays.
Benefit: The character adds +1 to all attack rolls the character makes using the selected weapon.
Special: The character can gain this feat multiple times. Its effects do not stack. Each time the character takes the feat, it applies to a new weapon.