Snap Shot
With a ranged weapon, you can take advantage of any opening in your opponent’s defenses.
Prerequisite: Dex 13, Point-Blank Shot, Rapid Shot, Weapon Focus, base attack bonus +6.
Benefit: While wielding a ranged weapon with which you have Weapon Focus, you threaten squares within 5 feet of you. You can make attacks of opportunity with that ranged weapon. You do not provoke attacks of opportunity when making a ranged attack as an attack of opportunity.
Normal: While wielding a ranged weapon, you threaten no squares and can make no attacks of opportunity with that weapon.
Source: Ultimate Combat, p. 119