Penetrating Fire Feat 10
Source Pathfinder Guns & Gears
Requirements You're wielding a loaded firearm or crossbow.
You blast a bullet through one foe and into another. Choose two targets, one of which would give the other lesser cover against your ranged attacks. Make a single ranged Strike with the required weapon against both targets. This attack ignores any lesser cover the nearer target provides the other. Roll damage only once and apply it to each creature you hit. Penetrating Fire counts as two attacks for your multiple attack penalty.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
GunslingerThis indicates abilities from the gunslinger class.