Source Guns & Gears
You treat combat as an art and your pistol as an extension of your performance. You might wield a single pistol, a pair of pistols, or a pistol paired with a melee weapon to pull off showy maneuvers. However you slice it, though, the use of pistols or other one-handed firearms is crucial to your technique and style.
To you, everything is a show, and you use your gun as a prop and instrument, not just to kill opponents but to trick, mislead, hinder, and even bully them into doing what you want them to do. While others tend to focus on delivering as much devastation downrange as possible, your style is all about control. By controlling a foe's attention and actions, you can bolster your own attacks and mitigate the foe's potential for mayhem. You control the tempo of the battle much as you would a staged performance, carefully ensuring your foe's actions don't fall outside of your intended script. You're both the director and the star of this show, and your enemies dance to the tune you play with your pistol... sometimes quite literally!

Additional Feats

Source Player Core
Some archetypes include a list of “Additional Feats” that appear in other sources. The list includes each feat's level, which might be different than normal when gained from the archetype. You can take the feat as an archetype feat of that level, meaning it counts toward the number of feats required by the archetype's dedication feat. When selected this way, a feat that normally has a class's trait (such as the fighter trait) doesn't have that class trait.
Click here for the full rules on Additional Feats.