Outlaw

A lone gunman rides into town, a large silver revolver fixed to his hip. The sheriff steps out from his office, and immediately recognizes the face of the outlaw. But before he can reach for his weapon, the gunman draws his pistol and shoots the sheriff dead. He jumps from his steed and sprints to the door the sheriff exited, shoving the revolver into the stomach of the deputy, and unloading the remaining bullets into his chest. The gunman calmly stands, returns to his horse, and leaves the isolated town, never to return.

Gunsmith

You gain proficiency with Firearms and Tinker's Tools (your proficiency modifier is doubled if already proficient with Tinker's Tools). 

You gain an additional action, Reload. You can reload the magazine of your currently equipped weapon as an Action (as long as you have a free hand and the ammunition needed to refill the weapon).

You gain an additional action, Repair. When your equipped weapon misfires, you can use your action to try and repair it using your Tinker's Tools. 

Nimble Hands

You have trained in the art of the quickdraw, and have learned to stow or draw an additional weapon on your turn. You also gain an additional function to the Cunning Action feature, "Quick Load". You can load a single round into your equipped weapon.

Quickdraw

Starting at 3rd level, you gain an additional way to use your sneak attack. When engaging an enemy within 5 ft. of you with a firearm, you no longer suffer disadvantage on the roll. Instead, you roll your attack normally, and may add your sneak attack to your damage roll. You still suffer disadvantage on your ranged attack rolls if attacking an enemy that is not within 5ft of you while engaged in melee with an enemy.

Additionally, you may use a firearm when making an opportunity attack. However, you may not add your sneak attack dice when rolling for damage for such an attack.

Dexterous Repair

Starting at 3rd level, when you attempt to repair a broken firearm outside of combat, you may add your Dexterity modifier to your Tinker's Tools check (in addition to your Intelligence).

Fan the Hammer

Starting at 7th level, you learn to quickly unload multiple shots into your target. As an action, you may make a ranged attack at an enemy, and fire a number of bullets equal to your Intelligence Modifier (minimum of 1). If the attack hits, roll damage for each bullet. You may add your sneak attack damage to this roll. You may only use this action once per turn.

 

You may use this feature a number of times equal to your proficiency bonus, and regain all uses on a long rest.

Mounted Outlaw

Starting at 13th level, you become particularly adept at aiming your firearms from a mounted position. While mounted you have advantage on any ranged attack rolls made with a firearm.

In addition, you gain an additional option for your Cunning Action. As a bonus action, you may quickly mount or dismount your mount without expending any movement.

Hammer Down

When you use your Fan the Hammer feature, you score a critical hit on a roll of 15 or higher.