The big Modern Warfare 3 multiplayer reveal is quickly approaching. To whet your appetite a bit, developer Sledgehammer Games unveiled one of the big new features early. The Aftermarket Parts system is an overhaul to Conversion Kits, which is part of the weapon-building Gunsmith.
The Gunsmith was introduced with the 2019 Modern Warfare reboot, and was later expanded on with Modern Warfare 2, offering deeper customisation. Modern Warfare 3 is taking that a step further.
The goal of Aftermarket Parts and Coverstion Kits is to change the role of a weapon entirely. In the blog post detailing the feature, Sledgehammer Games gave three examples of weapons that play completely differently after conversion.