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This week’s challenges inCall of Duty: Modern Warfare 3award 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.
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
This week’s reward is theKR 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 assimilar 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.

