firearm marksman

You've learned to aim at even the smallest weakness in an enemy defense . You gain the following benefits:

• attack made at long range with a firearm you are proficient with does not impose disadvantage
• If you roll a misfire on an attack with a firearm, you can use your reaction to roll a d20. If the number rolled is higher than the weapon’s misfire score, the firearm does not misfire. You cannot use this feature again until you complete a short or long rest.
• Before you make a ranged attack with a firearm that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.