Modern Warfare 3 and Warzone Season 5 has introduced a third aftermarket part, the JAK Slash.

In this ONE Esports guide, we explain the function of this unique attachment and provide detailed instructions on how to quickly unlock it in the game.

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What is the JAK Slash?

This aftermarket part is an underbarrel vertical grip that also functions as a combat knife for most assault rifles, battle rifles, and submachine guns.

It replaces your standard melee attack using a gun-butt with a lethal slash, freeing up the option to equip a grenade or another lethal tool instead of the Throwing Knife.

JAK Slash aftermarket part under the underbarrel option in Modern Warfare 3 gunsmith
Screenshot by Jeremiah Sevilla/ONE Esports

Additionally, it enhances your vertical recoil control while boosting your movement and tactical sprint speed.

These benefits come at the expense of hip fire and tactical stance spread accuracy.

Here’s how to unlock JAK Slash in MW3 and Warzone

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To obtain this aftermarket part, you need to complete Week 3 challenges in Modern Warfare 3 and Warzone Season 5.

You must finish at least five out of the 21 tasks available across Multiplayer, Zombies, and Warzone.

Here are the MW3 and WZ Season 5 Week 3 challenges:

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MULTIPLAYERZOMBIESWARZONE
Get 25 Operator Hipfire Kills.Get 100 Point Blank Kills with a weapon.In Warzone Urzikstan, get 15 Operator Kills in the North-West Region (Resort, Power, Seaport, Cargo).
Get 30 Operator Kills shortly after sprinting with SMGs.Get 300 Critical Kills with an SMG.In Warzone Urzikstan, get 15 Operator Kills in the Eastern Region (Military Base or Farms).
Get 20 Operator Kills with silenced weapons or Throwing Knives.Get 50 Kills with silenced weapons or Throwing Knives.In Warzone Urzikstan, get 15 Operator Kills in the Southern Region (City, Suburbs, Manor).
Get 10 Operator Kills with the gun-butt of a weapon.Get 75 Kills with the gun-butt of a weapon.In Warzone Urzikstan, get 15 Operator Kills in the Central Region (Old Town, Low Town).
Get 10 Operator Hipfire Kills with battle rifles.Get 100 Hipfire Kills with battle rifles.In Warzone, place in the top 10 seven times.
Get eight Operator Kills with an underbarrel lethal attachment equipped to a weapon.Get 250 kills with a Pack-A-Punched weapon.In Warzone, complete 15 Contracts.
Get 15 Operator Kills with Covert Sneakers equipped or Dead Silence active.Get 30 Mercenary Kills with a marksman rifle.In Warzone, open 75 loot Caches.

Upon completing five challenges, you’ll be able to equip the JAK Slash in the gunsmith as an underbarrel attachment.

For a quicker way to earn this aftermarket part, we recommend focusing on Multiplayer. Participate in Hardcore Quick Play, Small Map Mosh Pit, or 10v10 Mosh Pit matches.

For Warzone players, concentrate on challenges that involve looting caches and completing contracts.

READ MORE: How to unlock Paracord Grip in Modern Warfare 3 and Warzone