You can fire a blast from your gun that attacks multiple foes.
<php>echo “<b>Prerequisites:</b>”;</php> Weapon Mastery (Guns)
<php>echo “<b>Benefit:</b>”;</php> As a standard action, you can make a single ranged attack with a gun that targets all creatures in a 30 ft. cone. Make a separate attack roll against each creature in the cone. If struck, creatures within the cone take damage from your shot, though any precision-based damage is applied only against the first creature struck.