CoD: Modern Warfare 3 Has A New Way To Unlock Attachments With Challenges
New armory unlock challenges will help speed up your weapon grind.
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Armory unlock challenges
Armory unlock challenges serve as Call of Duty's new system to let you unlock the weapons, equipment, perks, killstreaks, and attachments that you want to use the most. When you reach level 25, you'll unlock access to the armory unlock challenge system and begin to progress and complete challenges, unlocking new items. These challenges are completed by completing daily challenges. Each daily you complete earns you a point against your active armory unlock challenge.There are a variety of items you can earn through these challenges, which you can view in the armory unlocks challenge menu. This includes many attachments otherwise locked behind the lengthy grind of weapon progression, giving you a faster way to unlock all the customization options for the Gunsmith.