Starting at 3rd level, you always have certain spells prepared after you reach particular levels in this class, as shown in the Gunsmith Spells table. These spells count as artificer spells for you, but they don’t count against the number of artificer spells you prepare.

Thunder Monger

Also at 3rd level, you forge a deadly firearm using a combination of arcane magic and your knowledge of engineering and metallurgy. This firearm is called a Storm Cannon, a ferocious weapon that fires blasts of sonic energy. You are proficient with the Storm Cannon. It is a two-handed ranged weapon that deals 2d6 thunder damage. Its normal range is 75 feet, and its maximum range is 300 feet. Firing the cannon produces a booming sound that can be heard up to 200 feet away.

As a bonus action, you can charge the cannon with greater power on its next attack within 1 round. If the attack hits, it inflicts an additional 1d6 thunder damage. This extra damage increases by 1d6 when you reach certain levels in this class: 7th level (2d6), 11th level (3d6), 15th level (4d6), and 19th level (5d6). When fired in this way, the sound it produces can be heard up to 300 feet away. Other creatures are unable to charge the cannon.