Unfinished Gun

 is a gun that fires piercing bullets in a short range. Like the gun's appearance, the bullets fired appear red-hot, and will fade into ashes once they travel far enough.

Upon unlocking every item and gun in the Ammonomicon (except Number 2), Unfinished Gun is permanently upgraded into Finished Gun.

Trivia

 * The Blacksmith can be seen working on an Unfinished Gun.
 * During development, Unfinished Gun may have been used as a template for creating new guns, as evidenced by many of the unused guns having its name and Ammonomicon description.