Most warriors and combat specialists spend their years perfecting the classic arts of swordplay, archery, or pole arm tactics. Whether duelist or infantry, martial weapons were seemingly perfected long ago, and the true challenge is to master them.

However, some minds couldn’t stop with the innovation of the crossbow. Experimentation with alchemical components and rare metals have unlocked the secrets of controlled explosive force. The few who survive these trials of ingenuity may become the first to create, and deftly wield, the first firearms.

This archetype focuses on the ability to design, craft, and utilize powerful, yet dangerous ranged weapons. Through creative innovation and immaculate aim, you become a distant force of death on the battlefield. However, not being a perfect science, firearms carry an inherent instability that can occasionally leave you without a functional means of attack. This is the danger of new, untested technologies in a world where the arcane energies that rule the elements are ever present.

Should this path of powder, fire, and metal call to you, keep your wits about you, hold on to your convictions as a fighter, and let skill meet luck to guide your bullets to strike true.

Level 3: Gunslinger Discipline

Your experience on the battlefield has refined your fighting techniques. You learn deeds that are fueled by special dice called Discipline.

Deeds. You learn three deeds of your choice. Many deeds enhance an attack in some way. You can use only one deed per attack.

You learn two additional deeds of your choice when you reach Fighter levels 7, 10, and 15. Each time you learn new deeds, you can also replace one deed you know with a different one.

Discipline. You have four Discipline. A Discipline is expended when you use it. You regain all expended Discipline when you finish a Short or Long Rest.

You gain an additional Discipline when you reach Fighter levels 7 (five total) and 15 (six total).

Saving Throws. If a deed requires a saving throw, the DC equals 8 plus your Strength or Dexterity modifier (your choice) and Proficiency Bonus.

Level 3: Gunsmith

At 3rd level, you gain proficiency with firearms and Tinker's Tools. 
You may use the tools to craft ammunition, repair damaged firearms, or possibly draft and create new ones.

Level 7: Evermeet's Future of Warfare

At 7th level your firearm shots count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.  

Level 10: Dealing with Lead

Upon reaching 10th level, you gain expertise in the Intimidate skill, even if you did not already have Intimidate.  This allows you to use double your proficiency bonus on Intimidate checks.

Level 15: Unwavering Discipline

Starting at 15th level, when you roll initiative and have no Discipline points remaining, you gain 4 points.

Level 18: Jorfis' Shot

At 18th level, you have the ability to call a truly deadly shot.  You can spend 5 points of discipline to focus on a shot so debilitating that the target must make a Constitution saving throw.  If it fails, the target is reduced to 0 hit points.  If it succeeds, it takes 10d10 necrotic damage.  You can only affect one creature in this manner once per round, and only twice per short rest

Level 3: Deed Options

The deeds are presented here in alphabetical order.

As a Unit

Expend two discipline points, and when you take the Attack action on your turn, you can forgo one of your attacks to direct one of your companions to strike. When you do so, choose a friendly creature who can see or hear you. That creature can immediately use its reaction to make one weapon attack, adding your Wisdom modifier to the attack's damage.

Between the Eyes

Expend 2 Discipline and you can hold your attack action until a creature enters your firearms first range increment. You make your attack action and if at least one shot hits, you reduce their speed to 0ft until the end of your next turn.

Cheat Death

Expend 2 Discipline and when reduced to 0 hit points, you instead drop to 1 hit point.

 

Dead Eye

You can add your Wis modifier to the attack roll of a firearm shot.

Disarming Shot

Expend 1 discipline, and if the shot hits, the target takes normal damage and must make a Strength saving throw. On a fail, the target must drop 1 held item of your choice.

Fan the Hammer

Expend 1 Discipline and immediately after you take the attack action on your turn, you can fire off two more shots in quick succession as a bonus action.

Fleet of Foot

Expend 2 Discipline, and your lightning fast reflexes allow you to move quicker than anyone on the battlefield. Right before combat you can double your DEX bonus that is added to your Initiative roll; additionally, on your first turn, you can take the dash action as a bonus action.

 

Gone with the Wind

Expend 2 Discipline, and when you are subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, you instead take no damage if you succeed on the saving throw, and only half damage if you fail.

 

Gunslinger's Dodge

Expend 1 Discipline and when a ranged attack roll is made against you, you can take a reaction to move 5 ft. with +2 AC, or drop prone for +4 AC.

Lightning Reload

Expend 1 Discipline and you can reload any firearm as a free action.

Overpowering Shot

You can spend Discipline points up to twice a firearms misfire score to roll one additional weapon damage die for each point spent. For each point dedicated, that attack gains +2 to the misfire score (does not allow you to dedicate more points than twice the firearms natural misfire score). You can activate this Deed after a hit is confirmed.

Parting Shot

Expend 1 Discipline, and when you take the disengage action, you can fire at a target as a bonus action.

 

Piercing Shot

Your accuracy is unrivaled. If you hit a creature with a shot, you can spend 1 Discipline per attack roll to attack each creature directly behind them with disadvantage within your first range increment.

Pistol Whip

Expend 1 Discipline, and you can make a melee attack roll with the butt/handle of your gun against an enemy within 5 ft. of you as a bonus action after making using the attack action with your gun. This attack roll uses your full proficiency bonus and deals 1d4 + your Str modifier bludgeoning damage.

Return Fire

Sculpt Burst

When using the burst rifle, expend 1 Discipline to sculpt your bullets around a number of allies equal to your proficiency bonus.

Seasoned Gunsmith

Expend 2 Discipline and you can fix a jammed firearm as a result of a misfire as a free action.  Your repair DC is always 10, even if the firearm's misfire score is higher.  If you fail the check, the firearm doesn't gain the broken condition, though it still needs to be successfully cleared before it can fire again.

Slinger's Luck

Expend 3 Discipline and you can reroll a saving throw or ability check and must use the new roll, even if it is lower.

 

Smoke and Mirrors

Expend 2 Discipline to give the illusion of disarming yourself or lower your weapon, only to quickly spring into action with a rapid barrage. Roll deception contested against the targets insight roll.

Warning Shot

Expend 2 Discipline, and you can fire a shot next to a target and the target must make a Wisdom saving throw or be stunned until the start of your next turn. This consumes your action.