- "Converts this shotgun into a hard-hitting, automatic battle rifle."
- — In-game description
The JAK Jawbreaker is a conversion kit for the KV Broadside shotgun featured in Call of Duty: Modern Warfare III as part of the Aftermarket Parts system. It was added as part of the Season Three update.
It locks the KV Broadside into fully automatic fire, and changes the caliber to .458 SOCOM. The JAK Jawbreaker also blocks the modification of the KV Broadside's ammunition, barrel, magazine, and bolt.