All MW3 Aftermarket Parts & how to get them: JAK Cutthroat, Wardens, more

Max Candelarezi
MW3 Aftermarket Parts Season 3

MW3 is host to many unique Aftermarket Parts for players to unlock. Here are all the MW3 Aftermarket Parts and how to get them, including the new Season 3 additions.

Each MW3 season introduces a new set of Aftermarket Parts, and the Season 3 update brings eight new attachments to the game. These Aftermarket Parts change the behavior and provide powerful buffs to various weapons.

If you’re wondering how to get every MW3 Aftermarket Part, here’s all you need to know, including which weapons they’re compatible with.

How to unlock every MW3 Aftermarket Part

To unlock MW3‘s Aftermarket Parts, players will have to earn them through the Battle Pass, Armory Unlocks, and Weekly Challenges.

Aftermarket Parts have the potential to enhance specific attributes of a particular gun or weapon category, or they can completely alter both the functionality and appearance of the chosen gun.

Keep in mind we’ll update this list as new Aftermarket Parts and their unlock methods are revealed throughout MW3’s Season 3.

Here’s how to get every Aftermarket Part that’s available in MW3:

  • JAK Purifier: Armory Unlock – Complete five Daily Challenges
  • JAK Headhunter Carbine Conversion: Armory Unlock – Complete five Daily Challenges
  • JAK Bullseye: Armory Unlock – Complete two Daily Challenges
  • JAK Beholder Rifle Kit: Armory Unlock – Complete five Daily Challenges
  • JAK Signal Burst: Armory Unlock – Complete three Daily Challenges
  • JAK Ettin Double Barrel Kit: Armory Unlock – Complete five Daily Challenges
  • JAK BFB: Armory Unlock – Complete eight Daily Challenges
  • JAK Thunder LMG Kit: Armory Unlock – Complete five Daily Challenges
  • JAK Burnout: Armory Unlock – Complete three Daily Challenges
  • JAK Tyrant 762 Kit: Armory Unlock – Complete five Daily Challenges
  • JAK Limb Ripper: Armory Unlock – Complete eight Daily Challenges
  • JAK Maglift Kit: Armory Unlock – Complete five Daily Challenges
  • JAK Glassless Optic: Armory Unlock – Complete three Daily Challenges
  • JAK Backsaw Kit: Armory Unlock – Complete five Daily Challenges
  • JAK Outlaw-277 Kit: Armory Unlock – Complete eight Daily Challenges
  • JAK Jawbreaker: Complete any five challenges from Week 2
  • JAK Cutthroat: Complete any five challenges from Week 3
  • JAK Shadow Titan Kit: Complete any five challenges from Week 1
  • JAK Revenger Kit: Weekly Challenge unlock
  • JAK Patriot: Weekly Challenge unlock
  • Wardens: Weekly Challenge unlock
  • JAK Atlas Kit: Weekly Challenge unlock
  • Photonic Charge Barrel: N/A

Every MW3 Season 3 Aftermarket Part

The MW3 Season 3 update brings eight new Aftermarket Parts to the game for various weapons, including MW2 guns, so here are all of them and their compatible weapons.

Aftermarket PartDescriptionCompatibility
JAK Cutthroat3D-printed stock that provides speed and stability while ADS.MCW, MTZ, M4, and AMR9
JAK Revenger KitConversion Kit that gives the BP50 a shortened receiver and high-capacity magazine.BP50
JAK JawbreakerConverts the KV Broadside Shotgun into an automatic Battle Rifle.KV Broadside
JAK Shadow Titan KitConverts the Bruen Mk9 into a compact, suppressed light support weapon.Bruen Mk9
JAK PatriotTurns the Lockwood Mk2 into the iconic 1887 Akimbo Shotguns.M16
WardensTurns the Lockwood Mk2 into the iconic 1887 akimbo Shotguns.Lockwood Mk2
JAK Atlas KitConverts the AMR9 into a 5-round burst weapon.AMR9
Photonic Charge BarrelA hyper-advanced barrel that changes the fire nature of the Hold the trigger and release to let off a high-powered shot.MORS

Every MW3 Season 2 Aftermarket Part

MW3 Season 2 brings seven fresh Aftermarket Parts for several specific weapons and categories. Here’s every new Season 2 Aftermarket Part available in MW3.

Aftermarket PartDescriptionCompatibility
JAK BurnoutEnables a specific firing mode with a significantly higher fire rate, and risk of overheating leading to increased spread.Holger 26
JAK Tyrant 762 KitReplaces the receiver and magazine to support 7.62 BLK ammunition, transforming the gun into a “harder-hitting weapon.”Longbow
JAK Backsaw KitEnhances the maneuverability involving the complete removal of the stock.Holger 556
JAK Limb RipperProvides a Chainsaw underbarrel capable of “creating close-quarters carnage.”Several weapons
JAK Maglift KitStrengthens the magwell, bolt, and trigger assembly to support the use of an oversized drum magazine.Haymaker
JAK Outlaw-277 KitTransforms the BAS-B into a lever-action rifle, reducing its firing speed but significantly improving accuracy.BAS-B
JAK Glassless OpticA compact reflex optic without glass which provides a sharp and unobstructed view.Several weapons

Every MW3 Season 1 Aftermarket Part

MW3 Season 1 brought eight new Aftermarket Parts for several specific weapons and categories, so here’s every new Aftermarket Part available in MW3.

Aftermarket PartDescriptionCompatibility
JAK PurifierAn underbarrel flamethrowerMTZ-556, Holger 556, DG-56, SVA 545, RAM-7, MTZ-762, BAS-B, Sidewinder, Riveter
JAK Ettin Double Barrel KitCreates a pair of stacked barrels that fire simultaneously, resulting in double the damageAMR9
JAK Thunder LMG KitFeatures a high-capacity magazine and progressively increases its firing rateSidewinder
JAK BFBMinimizes recoil while notably amplifying muzzle soundMany Assault Rifles, Submachine Guns, Battle Rifles, Marksman Rifles, and Sniper Rifles
JAK BullseyeCompact dot Optic that provides an exceptionally clear and precise sight pictureMost weapon categories
JAK Signal BurstGrants a four-round burst fireHolger 556
JAK Beholder Rifle KitTurns the Rival-9 into an Assault Rifle with a “three-round burst”TYR
JAK Headhunter Carbine ConversionTurns the Rival-9 into an Assault Rifle with “three-round burst”Rival-9

All in all, that’s everything you need to know about MW3’s Aftermarket Parts. For more on the game, be sure to check out our other guides:

Modern Warfare 3 War mode explained | Modern Warfare 3 Zombies Zones explained | How to get MGB Tactical Nuke Killstreak in Modern Warfare 3 | When is Ranked Play coming to Modern Warfare 3? | Best controller settings for Modern Warfare 3 | Best FOV settings for Modern Warfare 3 | How to fix packet burst in Modern Warfare 3