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Call of Duty: Modern Warfare 3’sfourth season has released a new aftermarket part this week, unlocked upon completing any five of this week’s challenges. Each core playlist—Multiplayer, Zombies, and Warzone—has seven challenges each. If you complete five challenges from any playlist (or a mix of playlists), you’ll get your hands on the latest aftermarket part.
This week, completing these challenges will unlock the JAK Thumper for the RGL-80, which makes this the first launcher in MW3 to have attachments. Let’s go over how this attachment works and showcase all 21 challenges added in this set of Weekly Challenges for MW3.
Week 4 Challenge Reward
Upon completing any five challenges this week, you’ll unlock theJAK Thumper-656 KIt for the RGL-80.This effectivelyenables the use of ammunition attachmentson the RGL-80 at the cost of ADS speed and sprint-to-fire speed.
While this conversion kit is equipped, you’ll have access to three unique attachment options:
