Conversion Kits or Aftermarket Parts are a new type of attachment in Modern Warfare 3 (MW3) that allow you to fully convert your weapon. Read on for a full list of all Conversion Kits in MW3 and learn how to equip Conversion Kits for your gun, in-game.

List of All Conversion Kits

All Conversion Kit Types

There are three confirmed general Conversion Kit types so far—namely the Bullpup Kit, Carbine Kit, and the Akimbo Kit.

How to Get Conversion Kits

Complete In-Game Challenges

In order to unlock Aftermarket Parts, players will have to complete in-game challenges that become available once they reach the weapon's max level.

List of All Weekly Challenges and Rewards

All Confirmed In-Game Challenges

Complete these challenges to unlock the Conversion Kits for these weapons!

• Pulemyot LMG - Get 25 Kills while hip firing or using Tac-Stance.
• Renetti Handgun - Get 30 Kills with five attachments equipped.
• WSP Swarmwith Akimbo - Unlock by completing a weekly challenge in the preseason.

What are Conversion Kits?

Converts a Weapon to Something Unique

Conversion Kits or Aftermarket Parts fully convert a weapon into something unique and entirely new for you to use after you've mastered the gun in Multiplayer. These changes are much more drastic than those offered by Blueprints, often altering the weapon type of the converted gun entirely (e.g., Handgun becoming a Full-Auto Carbine).

This allows players to create a unique identity for the guns in their arsenal that are not possible through the use of regular attachments.

How to Equip Conversion Kits

Unlock the Conversion Kit for Your Gun

Conversion Kits or Aftermarket Parts are Seasonal Unlocks and can only be obtained as a reward from the Weekly Challenge system of each season. Once a season ends, Conversion Kits you failed to unlock during the season will get their own unlock challenges upon entering the Armory.

Master the Weapon to Equip the Conversion Kit

Before you can equip a Conversion Kit attachment for your gun in MW3, you will first need to master its compatible weapon. To master a weapon, you will need to max out its weapon level by equipping it and earning Weapon XP via MW3 multiplayer, Zombies, or Warzone matches.

Once a weapon is mastered and its Conversion Kit unlocked, you can equip the conversion via the Gunsmith in the Loadouts menu of the game.

Modern Warfare 3 (MW3) Related Guides

List of All Attachments

Attachment Types in MW3