- "Dominate lanes and hold objectives with this LMG conversion kit that brings a large capacity magazine and ramps in fire rate the longer you hold down the trigger."
- — In-game description
The JAK Thunder LMG Kit is a conversion kit for the Sidewinder battle rifle featured in Call of Duty: Modern Warfare III as part of the Aftermarket Parts system. It was added as part of the Season One Reloaded update.
The Thunder LMG Kit grants the Sidewinder a 50-round drum magazine while modifying the fire-rate to ramp up as the trigger is pulled.
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