Bayoneteer

You have mastered the art of fighting with weapons attached to the barrel of your gun. You gain proficiency with improvised weapons if you don't have it already, and if you make an attack with a weapon attached to the barrel of your gun, you may add a +2 bonus to the damage roll.

Additionally, if you would be hit with a melee attack, you can use your reaction to assume a parrying stance with the bayonet, adding your proficiency bonus to your AC against a single melee attack that would hit you, potentially causing the attack to miss.