Your life of slinging lead has taught you more than a few tricks. You gain the following attributes when referring to the use of firearms.

-You no longer have disadvantage when attacking with a firearm against an enemy that is within close range (15 feet).

-Your bullets now penetrate when you hit an enemy with a firearm attack. The next creature in line with your target (within 30 feet) must make a Dexterity saving throw based on a DC of 8 + DEX + your proficiency modifier. On a failed saving throw the second target takes damage equal to half of the first.  On a success they take no damage.

-When taking the attack action, you may make an extra attack with a firearm you are holding as a bonus action.