WEAPON UNCOMMON TECH
A full tank of fuel has 4 charges.
Flames (line) - 1 charge. 20 ft., 5 ft. wide, all creatures must make Dexterity Saving Throw DC 8 + (Firearms Proficiency Bonus) + Dexterity Modifier, on success the creature takes half damage, 2d6+6 Fire Damage
Flames (Cone) - 2 charge. 15 ft. Cone, all creatures must make Dexterity Saving Throw DC 8 + (Firearms Proficiency Bonus) + Dexterity Modifier, on success the creature takes half damage, 2d6+6 Fire Damage