The Judge

 is a gun. The last shot of a magazine will randomly fire one of the following special rounds:
 * A green bullet that deals 4 damage and poisons the enemy.
 * A flare that deals 4 damage and burns the enemy.
 * A blue bullet that deals 3 damage and freezes the enemy.
 * An orange shot that deals 10 impact damage and explodes, dealing 25 additional damage.

Trivia

 * If the player has Badge, the Judge's maximum clip is reduced from 9 to 5, allowing its special shot to be fired more frequently. Replaced with the synergy.
 * This gun is a reference to Judge Dredd's gun, the Lawgiver.
 * The pickup quote "Hot Shot" is one of the Lawgiver's settings.