From Pathfinder Guns & Gears, which isn't enabled.

Blood in the Air

FEAT 12

Activity 1 action

Requirements An enemy you've damaged with a ranged weapon during the last minute is Concealed or Hidden from you.

Once you've locked on to a target, little can obscure your aim. Make a ranged weapon Strike against the required target. This Strike ignores the target's concealed condition and reduces the flat check for the hidden condition from 11 to 5.

Pathfinder Guns & GearsORC