Feats

Firearms Proficiency
After a period of practice you are now proficient with all types of firearms and with the use of the Gunsmithing Kit

Firearms Expertise
Thanks to extensive practice with firearms, you gain the following benefits:
You ignore the loading quality of firearms with which you are proficient.
Being within 5 feet of a hostile creature doesn’t impose disadvantage on your ranged attack rolls.
When you use the Attack action and attack with a one-handed weapon (such as the Gunslinger class’ Pistol Whip ability), you can use a bonus action to attack with a loaded firearm you are holding (note that this can be the same weapon).

Feats

Black Powder & Dark Magic Barabbas