The material below is Open Game Content from a 3PP Source
Extra Grit (Grit)
You have more grit than the ordinary gunslinger.
Prerequisites: Grit class feature or the Amateur Gunslinger feat.
Benefit: You gain 2 extra grit points at the start of each day, and your maximum grit increases by 2.
Normal: If you are a gunslinger, you gain your Wisdom modifier in grit points at the start of each day, which is also your maximum grit. If you have the Amateur Gunslinger feat, you gain 1 grit point at the start of each day, and your maximum grit is equal to your Wisdom modifier.
Special: If you possess levels in the gunslinger class, you can take this feat multiple times.