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Call of Duty: Modern Warfare 3has given daily challenges a breath of fresh air, making them much more useful than previous installments of the series.
One such use for daily challenges is unlocking items in your armory, including aftermarket parts. The WSP Akimbo Brace Stock is a conversion kit that you’re able to unlock for the WSP Swarm, and it is a manageable unlock, even for newer players.

How To I Unlock Armory Items?
Unlike previous Call of Duty games, you are able todecide the orderin which you unlock many of the available attachments.
This can be done byopening the Armory Unlock Challengemenu from the multiplayer play screen.

How Do I Unlock The WSP Akimbo Brace?
Within the Armory Unlock Challenge menu, open theaftermarket partstab.
Yourcurrent daily challengescan be viewed on theleft side of the Play screen. All fivedo not need to be completed in one day, so you are free to let thechallenges refreshif none of them catch your eye.
What Does the WSP Akimbo Brace Do?
The Akimbo brace allows you to run around withakimbo WSPswhile alsostabilizing the hipfire spread.
—Sprint to Fire Speed

—Rate of Fire