Lower Case r

 is a gun that fires a burst of 6 bullets that spell out the word BULLET. While firing, the gun will voice out the word "bullet".

Trivia

 * The voice that says the words shot by the gun out loud belongs to Doseone, the game's composer.
 * The reload animation consists of deleting the letter, through use of backspace, and typing a new one.
 * Lower Case r's bullets leave behind the word BLAM!! whenever they hit something.
 * This could be a reference to old ASCII Adventure games, where letters would commonly be used to represent items, pickups and weapons based on their visual similarities.
 * The pickup quote "Alphabetical!" could be a reference to Finn from Adventure Time exclaiming "Mathematical!"
 * The word "TAFFER" which can be fired with Angry Bullets is a reference to the same word used as an insult by guards in Thief: The Dark Project.
 * The synergy may be a reference to the game Crypt of the Necrodancer. Reanimate is a line said by the Necrodancer and has become somewhat of a running gag in the community.
 * The synergy Just In Case transforms this item into the Upper Case R, originally intended to be its own gun, which has its own unused Ammonomicon entry. This is what it says:
 * ''The uppercase version of the letter r.

Although the uppercase version of the r character does not resemble a gun, the space between the two lower markings does create a kind of chute shape, and chute sounds a lot like shoot. The rest is obvious.''