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.

How to get MW3 Aftermarket Parts

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

Keep in mind we’ll update this list as new Aftermarket Parts are revealed throughout MW3’s Season 1, as eight of them are currently available in the game.

Here’s how to get every Aftermarket Part available as of January 18:

• JAK Purifier: Reach and complete the A14 Sector of the Season 1 Battle Pass
• JAK Headhunter Carbine Conversion: Complete any five Challenges from Week 1
• JAK Bullseye: Complete any five Challenges from Week 2
• JAK Beholder Rifle Kit: Complete any five Challenges from Week 3
• JAK Signal Burst: Complete any five Challenges from Week 5
• JAK Ettin Double Barrel Kit: Complete any five Challenges from Week 6
• JAK BFB: Get 10 Operator or Special Zombie Hipfire Kills with SMGs
• JAK Thunder LMG Kit: Get 10 Operator or Special Zombie Kills while Aiming Down Sights with SMGs

All in all, that’s everything you need to know about MW3’s Aftermarket Parts.