How to unlock the MX9 in Modern Warfare 2
Want to learn how to unlock the MX9 in Modern Warfare 2? The MX9 may not be the best SMG in Call of Duty: Modern Warfare 2 right now, but don’t let that deter you if your heart’s set on unlocking it. With the right build, any gun can become your weapon of choice.
On this page, we’ll help you navigate MW2’s oft-confusing weapon platform system to unlock the MX9.
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