How to get JAK Harbinger Kit in Modern Warfare 3 and Warzone

Get this for your M4.

Modern Warfare 3andWarzoneSeason 4 update adds the JAK Harbinger Kit in the growing list of aftermarket parts.

However, this attachment for the iconic M4 assault rifle is initially locked, requiring players to complete a specific process to acquire it in the game.

Preview of JAK Harbinger Kit attached to M4 in Modern Warfare 3

With that said, here’s all you need to know about obtaining the JAK Harbinger Kit in Modern Warfare 3 and Warzone.

Here’s how to unlock the JAK Harbinger Kit aftermarket part in MW3 and WZ

The JAK Harbinger is a .50 Cal conversion kit for the M4 assault rifle, which makes the weapon extremely deadly by improving its time to kill at the cost of slow fire rate, drop in bullet velocity, and a significant increase in recoil.

The only way to unlock the JAK Harbinger Kit is by completing weekly challenges in Multiplayer, Zombies, or Warzone during week 1 of Modern Warfare 3 and Warzone Season 4.

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Here’s the complete list of season 4 week 1 challenges:

Once you complete at least five challenges from any of the primary modes, you can access the JAK Harbinger Kit in the loadout menu for the M4 assault rifle.

We recommend completing the tasks in Multiplayer to quickly obtain this aftermarket part. Enter matches in Hardcore or Small Map Mosh Pit playlists.

JAK Harbinger Kit weekly challenges in Modern Warfare 3 and Warzone

Meanwhile, for Warzone players, finish challenges that involve opening loot caches and completing contracts first, then go for the operator kills.

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