You can make quick attacks with your ranged weapon.
Benefit(s): If a weapon being used has sufficient ammunition, fire two shots off at the same time at the same target. This grants you an additional die of damage (1d6 becomes 2d6) on your attack roll, and imposes a -2 penalty to hit. This is done as part of a standard attack, and can be coupled with full-round attacks. This is only used on a ranged weapon.