Path Of The Gun-Zerrker

A firearm subclass for the Barbarian 

Firearm Proficiency

Starting when you choose this archetype at 3rd level, you gain proficiency with firearms, allowing you to add your proficiency bonus to attacks made with firearms.

Gunsmith

Upon choosing this archetype at 3rd level, you gain proficiency with Tinker’s Tools. You may use them to craft ammunition at half the cost, repair damaged firearms, or even draft and create new ones (DM’s discretion). Some extremely experimental and intricate firearms are only available through crafting.

Adept Heavygunner

When you choose this archetype at 3rd level, you learn to perform powerful trick shots to disable or damage your opponents using your firearms.

Trick Shots. You learn two trick shots of your choice, which are detailed under “Trick Shots” below. Many maneuvers enhance an attack in some way. Each use of a trick shot must be declared before the attack roll is made. You can use only one trick shot per attack.

You learn an additional trick shot of your choice at 6th, 10th, and 14th level. Each time you learn a new trick shot, you can also replace one trick shot you know with a different one.

Grit. You gain a number of grit points equal to your Wisdom modifier (minimum of 1). You regain 1 expended grit point each time you roll a 20 on the d20 roll 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 all expended grit points after a short or long rest.

Saving Throws. Some of your trick shots require your targets to make a saving throw to resist the trick shot’s effects. The saving throw DC is calculated as follows:

   Trick Shot save DC = 8 + your proficiency bonus + your Strength modifier

Gun - Rage

At 6th Level you can add your Strength modifier to your Attack roll when using heavy guns or Duel wielding guns while in rage  

Rapid Repair

Upon reaching 10th level, you learn how to quickly attempt to fix a jammed gun. You can spend a grit point to attempt to repair a misfired (but not broken) firearm as a bonus action.

Ultimate Weapon

You can reload on your bonus action, and when you rage your guns wont jam and any guns jammed will auto unjam.