The first season for Call of Duty: Modern Warfare 3 is just past the halfway point, and has added The Ettin attachment to the game. The new Aftermarket Part is for the AMR9 SMG, and here is how to unlock it to use in the game.
How to Unlock The Ettin in MW3
The Ettin can be unlocked by completing five Season 1 Week 6 challenges. The five challenges do not have to be done in the same week, but must be done before Season 1 is over to receive the Aftermarket conversion kit.
