Marksmen Adept

You have firearm training that allows you to perform special trick shots. You gain the following benefits:

• You learn one trick shot of your choice from among those available to the Gunslinger archetype in the fighter class. If a trick shot you use requires your target to make a saving throw to resist the trick shot's effects, the saving throw DC equals 8 + your proficiency bonus + your Dexterity modifier.
• You gain one grit point (this point is added to any grit points you have from another source). This grit point is used to fuel your trick shots. A grit point is expended when you use it. You regain 1 expended grit point each time you roll a 20 for an attack with a firearm, or deal a killing blow with a firearm to a creature of significant threat (DM’s discretion). You regain your expended grit points when you finish a short or long rest.