The 31-79 JGb215 is a Wonder Weapon available from the Mystery Box. It causes the zombie that the player shot at to shrink, rendering a one hit kill. The player can hit it with a gun, knife it, or just run up to it and kick it.
When upgraded it becomes The Fractilizer, shrinking zombies for longer.
- It has a logo that resembles a rocket.
- There is a small Naga statue on it, and it has moving fins.
- It shrinks Napalm Zombies and Shrieker zombies for 1 second, when Pack-a-Punched, however, they shrink for 5 seconds.
- The "Baby Maker" was invented by Dr. Maxis.