In this Modern Warfare 2 DMZ guide, this will show you 3 simple ways you can get/permanently unlock the M13B weapon from the boss "The Chemist" in the radiation zones after the patch. There is going to be a solo method AND two co-op strategy's to be able to let you unlock this great assault rifle as efficiently as possible wether you are alone or with friends!

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Chapters:
00:00- Intro
00:43- Conditions for Unlocking
01:46- Gear Checklist
03:15- Solo Method
07:40- Co-op Method
08:59- Guns Blazing Method

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