With yearly releases, Call of Duty needs to change things up to keep it fresh. One of the new features in Modern Warfare 3 is Aftermarket Parts and Conversion Kits.
How to Unlock "AFTER MARKET PARTS" (What They Do) – Modern Warfare 3
These parts and kits allow CoD players to transform their favorite weapons into new threats. They increase the overall variety of the game, but unlocking them is far from easy. You’ll need a lot of XP in the process, so save up those double weapon XP tokens and get gaming.
Here you will find everything you need to know about aftermarket parts and conversion kits in MW3.
Aftermarket Parts and their Conversion Kits are unlocked via challenges once a weapon reaches max level. If you want to upgrade your weapon with Conversion Kits, you must first level it up to max level to unlock the corresponding slots.
