When you cast Aaracks Astral Firearm, choose a point within range and choose a type of Firearm from Pistol, Machine gun, or  Shotgun.

On your turn as an action you can move the Firearm up to 30 FT in any direction as long as it does not exceed range. After movement the firearm will shoot at the closest target within 10 feet dealing damage depending on what type of firearm it is. Shooting a target also uses one charge if the fire arm runs out of charges the spell ends prematurely. All guns have 5 charges.

Shot Gun, Deals 4d12 piercing damage to the target and half that to any creature withing 5 feet of the target. (save DEX 20)

Pistol,   3d12 piercing damage fires 3 shots with the same rules but ignores already shot targets unless they are the only available targets. (save DEX 17)

Machine Gun, 2d12   fires 5 shots with the same rules but ignores already shot targets unless they are the only available targets. (save DEX 15)