The JAK Slash Aftermarket Part is now available to unlock in MW3 and Warzone as part of the Season 5 Week 3 challenges. This is an underbarrel attachment that enhances recoil control and also acts as a combat knife, allowing for powerful melee attacks at point-blank range. It's an excellent addition for players with an aggressive playstyle.To acquire this Aftermarket Part, you need to complete a certain number of Season 5 Week 3 challenges. This article will outline the steps required to unlock the JAK Slash underbarrel attachment in MW3 and Warzone.How to get the JAK Slash Aftermarket Part in MW3 and WarzoneTo unlock the JAK Slash Aftermarket Part, you must complete five Season 5 Week 3 challenges in Call of Duty MW3 and Warzone.Every Wednesday, Sledgehammer Games, one of the developers of the game, refreshes the weekly challenges, making new sets available to players.Each title, including MW3 Multiplayer, MW3 Zombies, and Warzone, receives its own set of challenges. Completing these challenges provides experience points (XP), and completing any five from your preferred title will unlock the JAK Slash Aftermarket Part. However, the five challenges must be from a single set.Also read: How to get the Purified Helix camo in Warzone for free?MW3 and Warzone Season 5 Week 3 challengesHere are the tasks, as presented in-game:MW3 MultiplayerAll MW3 Multiplayer Season 5 Week 3 challenges (Image via Activision)Get 25 Operator Hipfire KillsGet 20 Operator Kills with Silenced Weapons or Throwing KnivesGet 10 Operator Hipfire Kills with Battle RiflesGet 15 Operator Kills with Covert Sneakers equipped or Dead Silence activeGet 30 Operator Kills shortly after Sprinting with SMGsGet 10 Operator Kills with the Gun-Butt of a WeaponGet 8 Operator Kills with an Underbarrel Lethal Attachment Equipped to a WeaponMW3 ZombiesAll MW3 Zombies Season 5 Week 3 challenges (Image via Activision)Get 100 Point Blank Kills with a WeaponGet 50 Kills with Silenced Weapons or Throwing KnivesGet 100 Hipfire Kills with Battle RiflesGet 30 Mercenary Kills with a Marksman RifleGet 300 Critical Kills with a SMGGet 75 Kills with the Gun-Butt of a WeaponGet 250 Kills with a Pack-A-Punched WeaponWarzone (Battle Royale)All Warzone Season 5 Week 3 challenges (Image via Activision)In Warzone Urzikstan, Get 15 Operator Kills in the North-West Region (Resort, Power, Seaport, Cargo)In Warzone Urzikstan, Get 15 Operator Kills in the Southern Region (City, Suburbs, Manor)In Warzone, place in the top 10 seven timesIn Warzone, open 75 Loot CachesIn Warzone Urzikstan, Get 15 Operator Kills in the Eastern Region Military Base (Military Base, Farms)In Warzone Urzikstan, Get 15 Operator Kills in the Central Region (Old Town, Low Town)In Warzone, complete 15 ContractsThis week, the MW3 Multiplayer challenges are relatively easy, requiring you to gather kills using different methods such as hipfire, silenced kills, and more. You can quickly complete these by playing a few matches.The MW3 Zombies challenges are also straightforward, although you may need to infil and exfil the region multiple times to complete all five challenges, which could take some time.However, the Warzone challenges are more difficult compared to previous weeks, where you simply needed to open Supply Boxes. This time, most tasks require you to gather kills in different regions of Urzikstan. The easiest way to accomplish this is by playing the Plunder mode, where the opposing players are less competitive, giving you a higher chance of gathering kills and unlocking the JAK Slash AMP.Check out our other Call of Duty articles:Black Ops 6 Zombies challenges and objectives leakedProp Hunt is reportedly returning in Black Ops 6Call of Duty's major blunder lets players access Black Ops 6 ahead of reveal