Point Blank Master

Combat

You are adept at firing ranged weapons in close quarters.

Prerequisite: Weapon Specialization with selected ranged weapon.

Benefit: Choose one type of ranged weapon. You do not provoke attacks of opportunity when firing the selected weapon while threatened.

Normal: Using a ranged weapon while you are threatened provokes attacks of opportunity.

Special: Starting at 6th level, a ranger with the archery combat style may select Point Blank Master as a combat style feat, but he must have Weapon Focus instead of Weapon Specialization in the selected weapon.

Source: Advanced Player's Guide