- "Deployable electronics jammer. Disables the enemy's comms and equipment, preventing them from calling for support."
- —Killzone.com Description
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The X3-JMR can be used to reveal cloaked enemies, shuts down drones, and prevent other enemies from using their VAN-Guards. It is also useful in some levels in Killzone Mercenary, as it deactivates land mines, allowing the user to pass through safely.
- The X3-JMR is the only VAN-Guard that is regularly used by factions other than mercenaries, such as the ISA.