Pistolero (D20 Modern Feat)
From D&D Wiki
Prerequisite: Point Blank Shot, Personal Firearms Proficiency, base attack bonus +4.
Benefit: You are a skilled shot with pistols and revolvers. When you hold a pistol or revolver in both of your hands, you inflict +1 damage.
Special: This bonus damage does not stack with the Weapon Specialization class feature.