Brassthunder

FIREARM RARE ORNITHOPTER GUN LARGE FIREARM SILENT PIERCING

Four small cannons with rotating barrels that can be fitted underneath an Ornithopter. Fires 4 times per attack.
Gunner. If you have Firearms proficiency and are familiar with the controls you can add your Proficiency Bonus to the attack roll.

Special attack

Sweeping strike. Spin up the barrels and fire in a sweeping motion. In a 20 foot cone all creatures must make a Dexterity Saving Throw DC12 or if you have Firearms proficiency and are familiar with the controls DC8 + Dexterity Modifier + Proficiency Bonus, whichever is higher. It deals 8d10 Piercing or Bludgeoning damage, if a creature fails it Saving Throw by more than 10 it takes an additional 4d10 damage, if a creature succeeds they take half damage. This attack spends all ammunition and will take 2 full turns to cool down and reload.

Strafe. Dive and spin up both barrels to maximum rotation. In a 100 ft. long, 5 ft. wide line, creatures must make a Dexterity Saving Throw DC12 or if you have Firearms proficiency and are familiar with the controls DC8 + Proficiency Bonus + Dexterity Modifier, whichever is higher, on failure they take 8d10 Piercing damage, on success half damage. After this attack the guns need to cool down for 1 full turn before you can fire again.

WEAPON ARTIFACT LONG RELOAD ARTILLERY FORCE FIRE

A brass and steel contraption that can be filled with rockets. It fires them all at once in a devastating barrage.

Long reload. Can be fired only once and reloading takes 1 hour.

Unstable Trajectory. Within 300 ft it affects a 20' radius but the missiles will scatter and strike randomly at longer range.

High Explosive. Deals 10d6 Fire Damage and 6d6 Force Damage, Weapon Save DC is the operator's (if they have Firearms proficiency and knowledge how to pilot the vehicle) 8 + Dexterity Modifier + Proficiency Bonus. If not the Save DC is 10. A creature that succeeds on the Saving Throw takes half damage. On failure they're knocked prone and must make a Wisdom Save DC12, on failure they are stunned until the end of their next turn.