- "A conversion kit designed for accuracy and controllability with 4-round bursts. Adaptable for close quarters scenarios with an integrated Laser that improves hip fire and tac stance accuracy."
- — In-game description
The JAK Signal Burst is a conversion kit for the Holger 556 and the DM56 featured in Call of Duty: Modern Warfare III as part of the Aftermarket Parts system. It was added with the release of the Season One update.
The Signal Burst Kit changes the Holger 556 and DM56 to burst fire, increasing overall recoil control, range, along with hipfire and Tac-Stance spread, at the cost of handling and fire-rate.
The DM56 also suffers a reduction in damage.
The kit also has a pre-installed optic, with a laser attached. It can be replaced by any other optic the player can equip.