Needs review
Source: Dark Sun 3

Description: You are trained in formation archery and taking out specific targets through joint efforts.

Prerequisites: Base Attack Bonus +1

When readying and firing projectile weapons at a single target, you add a +1 bonus to your attack roll for every other participant with this feat who readies and fires at the same target on your initiative count. The total bonus cannot exceed +4.

Special

A fighter may select Concentrated Fire as one of his fighter bonus feats