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This week's challenges in Call of Duty: Modern Warfare 3 award a new optic for most weapons, featuring an integrated laser for additional ADS speed and similar stats boosts. It's a solid attachment for most weapons and should definitely be obtained during the first season.

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But to unlock this optic, you must first complete five challenges from the Week 4 challenge pool. There are multiple challenges available in core Multiplayer, MWZ, and Warzone. This guide will cover every challenge available this week, and we'll give a brief overview of this week's reward: an Aftermarket optic with an integrated laser attachment.

Week 4 Challenge Reward

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This week's reward is the KR Intlas LSJ-3 optic. It features 4x zoom magnification and an integrated laser sight, increasing your weapon's aiming stability and ADS speed. The laser benefits are twice as strong as similar Aftermarket optics, providing a 4% ADS bonus and far more aiming stability. All non-sniper weapons that accept optics may use this scope.

Installing the Intas LSJ-3 onto your weapon does come with some downsides. This weapon emits a green laser while ADS that's visible to enemy players. Despite the in-game description, it only displays the laser while aiming; hipfire won't project anything. A small sniper glint will also appear while ADS, but this is incredibly hard to notice in core MP.

Multiplayer Challenges

Multiplayer Challenges Challenge XP Reward Get 10 longshot kills with a recommended weapon. 2,500 XP Get 30 hipfire kills with a recommended assault rifle. 5,000 XP Get 40 kills with a recommended assault rifle. 5,000 XP Get 40 kills with a magnified scope equipped to a recommended assault rifle. 5,000 XP Get 30 kills while aiming down sights with a recommended shotgun. 7,500 XP Get 30 kills with sights equipped to a recommended marksman rifle. 7,500 XP Get 20 operator kills while holding your breath with a recommended sniper rifle. 10,000 XP

Tips And Notes

  • Use the RAM-7 with hipfire attachments to quickly complete the AR challenges.
  • Magnified scopes refer to any optic attachment.
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Zombies Challenges

MWZ Challenges Challenge XP Reward Destroy 5 vehicles with a recommended weapon. 2,500 XP Get 100 kills shortly after reloading with a recommended battle rifle. 5,000 XP Get 300 critical kills with a recommended LMG. 5,000 XP Get 300 kills in full-auto fire with a recommended battle rifle. 5,000 XP Get 150 kills with frost damage with a recommended battle rifle. 7,500 XP Get 300 kills with a Pack-A-Punched recommended LMG. 7,500 XP Get 200 kills with a recommended LMG while Deadshot Daiquiri is active. 10,000 XP

Tips And Notes

  • Use the BAS-B with an extended magazine for the battle rifle challenges.
  • Weapons with Cryo Freeze ammo installed count as dealing frost damage.
  • Use Schematics to start the match with Pack-A-Punched weapons and Deadshot Daiquiri.

Warzone Challenges

Battle Royale Challenges Challenge XP Reward Get 40 operator kills or assists with a recommended weapon. 2,500 XP In Urzikstan, open 20 normal or legendary chests in the northwest region (Resort, Power, Seaport, Cargo). 5,000 XP In Urzikstan, open 20 normal or legendary chests in the southern region (City, Suburbs, Manor). 5,000 XP Complete 15 contracts in Warzone. 5,000 XP In Urzikstan, open 20 normal or legendary chests in the eastern region (Military Base or Farms). 7,500 XP In Urzikstan, open 20 normal or legendary chests in the central region (Old Town, Low Town). 7,500 XP

Tips And Notes

  • Chests emit a faint hum when nearby.
  • All MW3 weapons count as recommended weapons for the first challenge.
    • Meta options include the BAS-B, WSP Swarm, Pulemyot 762, and the MTZ Interceptor.
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