Aftermarket Parts in Call of Duty: What Does It Mean?
In the modern Call of Duty ecosystem (specifically Modern Warfare III and Warzone), Aftermarket Parts are not just standard attachments; they are transformative "Conversion Kits" that fundamentally change how a weapon behaves.
Unlike a standard barrel that might just add range, an Aftermarket Part can turn a pistol into an SMG, a burst-fire rifle into a full-auto shredder, or even add a flamethrower to your underbarrel.
Here is the breakdown of how this system truly works.
What Are Aftermarket Parts?
Aftermarket Parts are experimental modifications often manufactured by the fictional in-game company JAK (e.g., JAK Raven Kit, JAK Heretic). They allow you to "remix" a weapon you have already mastered.
- Conversion Kits: The most common type. These occupy one attachment slot but often completely replace the weapon's receiver, firing mechanism, or ammo type.
- Example: The JAK Ferocity Carbine Kit converts the Renetti pistol (usually 3-round burst) into a fully automatic SMG.
- Universal Attachments: Some Aftermarket Parts are special attachments that can be used on any weapon that accepts that type, not just one specific gun.
- Example: The JAK BFB is a muzzle brake that reduces recoil by a massive 60% but keeps you on the enemy radar longer.
- Example: The JAK Glassless Optic provides a crisp blue dot sight with almost zero visual recoil.
How to Unlock Them
You cannot unlock these parts simply by leveling up your gun. There are two primary ways to get them:
- Weekly Challenges: During a live Season, a new Aftermarket Part is released every Wednesday. You must complete 5 challenges (in Multiplayer, Zombies, or Warzone) for that specific week to unlock it.
- Armory Unlocks: If you missed a Weekly Challenge, the part is moved to the Armory. You must activate it there and complete Daily Challenges or win matches to earn it.
Strategic Impact on Gameplay
Aftermarket Parts often define the "Meta" (Most Effective Tactics Available) because they offer stats that standard attachments cannot match.
Part NameWeaponEffectStrategic UseJAK Raven KitMCW (AR)Increases fire rate and mobility.Turns a long-range AR into a close-quarters Sniper Support weapon.JAK Tyrant 762Longbow (Sniper)Increases damage but slows fire rate.Makes the sniper a consistent one-shot kill to the body.JAK PurifierUnderbarrelAdds a flamethrower.Instantly eliminates players using Riot Shields in close quarters.JAK Limb RipperUnderbarrelAdds a chainsaw.Provides an instant-kill melee attack for close-range panic situations.
Gunsmith "Sandbox"
It is crucial to note that equipping a Conversion Kit often changes which other attachments you can use.
- Example: If you equip a "Bullpup" conversion kit (like the Pulemyot 762's JAK Annihilator), it moves the magazine behind the trigger, shortening the gun. This often prevents you from equipping certain stocks or rear grips because the physical geometry of the gun has changed.
Pro Tip: Always check the Weekly Challenges tab every Wednesday. Aftermarket Parts are often time-gated, and unlocking them early gives you a significant advantage before the general player base catches on.