heavy weapons guy

a big man with a big gun, accuracy is optional.

when choosing this subclass you gain proficiency in light machineguns

gunsmoke frenzy

at the smell of gunsmoke you feel an uncontrollable urge to shoot averything that moves.

when you choose this subclass at level 2, you can shoot any firearm you are proficient with using strenght instead of dexterity.

you rage becomes gunsmoke frenzy, you can enter the frenzy by using a bonus action after attacking an enemy with a firearm, you gain all the benefits of the normal rage and gain the ability to make an additional attack as long as the frenzy lasts, however you have disadvantage on both attack rolls and your speed is halved for the duration.

suppressive fire

while you are in gunsmoke frenzy, whenever you attack a character, hit or miss, they gain disadvantage on dexterity rolls until the end of their next turn.

when this effect ends the character is immune to it until the end of its next turn

lead saturation

while in gunsmoke frenzy, whenever a character that you can see fails daxterity check or saving throw, you can make an attack against that character, however you must subtract the rage damage bonus form the damage roll instead of adding it.

infinite ammo!

as an action you can roll 3 damage dice adding all the bonuses you would normally add, and become immobilized. until you take damage you shoot in a 60ft cone in front of you every turn, this takes up your action, when you do so you attack evvery hostile character within the cone making one attack roll for everyone.