Trained in line infantry tactics you excel at using firearms and adapt at using the bayonet. You get bonuses when you take advantage of cover.
Level 3: Firearm Master
You become a master in handling firearms and firing them. Add your Proficiency Bonus to Attack Rolls with Firearms. Attacking with Firearms at Long Range doesn't impose Disadvantage.
Level 3: Rapid Reload
You can reload a firearm as a free action and ignore the loading properties.
Level 7: Bayonet Expert
As a Bonus Action, you can make an Attack Action with your bayonet. You get the special maneuver 'Charge' that lets you make a Single Attack with your bayonet after using the Dash Action. You can only do this once per turn.
Level 10: Grenadier
You become an expert at throwing bombs or grenades in battle. You can use a Bonus Action to throw them and ignore the Long Range penalty.
Level 10: Firing from Cover
When you enter an area of cover you automatically upgrade it to a higher cover value. When you're firing from cover with a Firearm you make ranged attacks with Advantage.
Level 15: Elite Infantry
Once per Short Rest you can treat a hit from a Firearm as a Critical Hit.
Level 18: Champion Marksman
- You add your Proficiency Bonus to the Damage Rolls when you hit with a Firearm.
- You can re-roll one's from Firearms and must take the new result.
- You score a Critical Hit with Firearms on a 18 - 20 or when you exceed the AC of the creature by 8.