The JAK Slash is the Aftermarket part unlock for Week 3 ofMW3Season 5. Here’s what you need to do to unlock it.

How to get the JAK Slash Aftermarket attachment inModern Warfare 3Season 5

In order to unlock the JAK Slash, you’ll first need tocomplete any five of the Weekly Challengesavailable to you. This can be done via playingMW3’sMultiplayer, Zombies, or Battle Royale modes. Each mode has a set of different challenges that you can pursue for the unlock. These challenges all count toward the required five, regardless of the game mode.

For the JAK Slash, I recommend completing all the necessary challenges inMW3’sMultiplayer mode, as the challenges there are super fast to finish and easy to do. There are several there that can be completed using one or two gun setups, which is highly convenient if you want to unlock it fast. Here are the ones I focused on.

JAK Slash equipped in Modern Warfare 3

I used theSidewinder Battle Rifleand theSupperi 46 SMGfor all these challenges, only changing around their attachments as necessary. The process was rather short thanks to the overlap these challenges allow for.

How strong is the JAK Slash inModern Warfare 3Season 5?

The JAK Slash attachment functions similarly to how a melee attack works when you have a Throwing Knife equipped in your Lethal slot. This is the largest advantage for the part, considering you don’t need to waste a slot equipping a Breacher or Throwing Knife to get a one-hit kill melee attack. The attachment also gives you a small boost to your Movement Speed, Sprint Speed, and Vertical Recoil at the cost of a small reduction to your Hipfire Spread and Tac Stance Spread. The JAK Slash can also, uniquely be equipped as an underbarrel on weapons that normally don’t allow attachments of this type.

The largest downside to the JAK Slash is that it takes up your Underbarrel slot. For many weapons, this isn’t a big deal, but depending on what you’re looking for, this disadvantage may not be worth it. Overall, it’s a very solid attachment that will see some use depending on the gun it is equipped on, though I don’t expect it to be commonplace in the meta.

Weekly Challenges in Modern Warfare 3

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