This gun fires fireballs. These fireballs function like a fireball spell cast by a level 1 Wizard, albeit with half the range, using the firer's Dexterity modifier instead of Intelligence for determining the save DC, and treating the spell as a level 1 spell. Nonproficiency with the Lesser Fireball Launcher reduces the Save DC by 4. Proficiency with the Fireball Launcher also grants proficiency with the Lesser Fireball Launcher. Although it is technically a magic item, firing it is an attack action that is as easy as just pulling the trigger.