The MW3 and Warzone Season 5 Week 4 challenges are underway, bringing fans a new set of tasks to complete and rewards to earn. The format of these challenges hasn't seen any changes from the previous weeks. There are seven challenges for each of the three modes (Multiplayer, Zombies, and Battle Royale) and each of these challenges brings XP rewards. But that's not all.Completing any five out of the seven challenges in any of the modes will unlock this week's final reward: an Aftermarket Kit for RAAL MG.In this brief article, we'll take a closer look at all the MW3 and Warzone Season 5 Week 4 challenges, what they entail, and the rewards they bring.All MW3 and Warzone Season 5 Week 4 challenges and rewardsHere are all the MW3 and Warzone Season 5 Week 4 challenges and rewards for all the game modes:MW3 Multiplayer Season 5 Week 4 challenges and rewardsAll MW3 Multiplayer Season 5 Week 4 challenges and rewards (Image via Activision)The MW3 Multiplayer Season 5 Week 4 challenges are straightforward and you will likely not face any problem completing any of them. However, one of the challenges requires you to get one-shot kills with a Shotgun, and if you're struggling to get it done in the regular Multiplayer modes, you should switch to the Hardcore playlist. As for the other challenges, they require you to get kills with different weapons and in different scenarios.Here are all the challenges and rewards:ChallengeRewardGet 20 Operator Kills while Prone2500 XPGet 25 Operator Kills with a Weapon set to Single Fire Mode5000 XPGet 2 Operator Kills with 1 Magazine 10 Times with Assault Rifles7500 XPGet 2 Operator Kills with 1 Magazine 5 Times with Marksman Rifles or Sniper Rifles10000 XPGet 30 Operator Kills while Moving with SMGs 5000 XPGet 12 Operator 1 Shot 1 Kills with Shotguns 5000 XPGet 8 Mounted Operator Kills 7500 XPAlso read: What is H2M? Modern Warfare Remastered mod explainedMW3 Zombies Season 5 Week 4 challenges and rewardsAll MW3 Zombies Season 5 Week 4 challenges and rewards (Image via Activision)The MW3 Zombies Season 5 Week 4 challenges are a tad difficult compared to last week's, but they aren't impossible. It might take you a few matches to get them all done. It should be noted that since some challenges this week require you to get Special Zombie kills, you can't dive in blind and must have the right set of guns and equipment.Here's what this week's challenges entail:ChallengeRewardGet 200 Kills with a Marksman Rifle with Cryofreeze Active2500 XPGet 75 Kills with a Weapon set to Single Fire Mode5000 XPGet 3 Disciple Kills7500 XPGet 5 Mangler Kills with a Marksman Rifle10000 XPGet 300 Kills while Moving with SMGs 5000 XPGet 200 1 Shot 1 Kills with Shotguns 5000 XPGet 200 Critical Kills with a Marksman Rifle 7500 XPWarzone Season 5 Week 4 challenges and rewardsAll Warzone Season 5 Week 4 challenges and rewards (Image via Activision)The Warzone Season 5 Week 4 challenges are easier than last week. In Week 3, players were tasked with getting kills in different parts of the Urzikstan map. This time around, you just have to loot caches in different locations and you'll be able to get them all done within a couple of matches, earning you a ton of XP effortlessly.Mentioned below are all Warzone Season 5 Week 4 challenges and rewards:ChallengeRewardIn Warzone Urzikstan, Open 20 Loot Caches in the North-West Region (Resort, Power, Seaport, Cargo)7500 XPIn Warzone Urzikstan, Open 20 Loot Caches in the Southern Region (City, Suburbs, Manor)7500 XPIn Warzone, place in the top 10 5 time(s)10000 XPIn Warzone, get 10 Operator Kills or Kill Assists with a Recommended Weapon2500 XPIn Warzone Urzikstan, Open 20 Loot Caches in the Eastern Region Military Base (Military Base, Farms) 5000 XPIn Warzone Urzikstan, Open 20 Loot Caches in the Central Region (Old Town, Low Town) 5000 XPIn Warzone, complete 15 Contract(s) 5000 XPRead more: Slept on Modern Warfare 2 SMG is still "insane" in WarzoneFinal reward for completing MW3 and Warzone Season 5 Week 4 challengesThe final reward for completing MW3 and Warzone Season 5 Week 4 challenges is the JAK Protean Aftermarket Part for the RAAL MG LMG. To unlock it, you must complete any 5 out of 7 challenges in any of the game modes. Once unlocked, you can equip it with the RAAL MG.The JAK Protean Aftermarket Part adds a telescoping barrel to the RAAL MG allowing it to shoot in both full-auto and semi-auto modes, thus adding versatility to the bulky gun. It also improves the accuracy of the LMG, making it a perfect fit for long-range engagements, especially when used in the semi-auto mode. Hence, if you want to unlock this kit and dominate your lobbies, it is highly recommended to get started with the MW3 and Warzone Season 5 Week 4 challenges right now!For more related Call of Duty articles, check out the links below:Best FJX Horus loadout is "underrated" in Warzone Season 5"Makes it even worse" - Fans are furious over growing map variants in MW3The Crow crossover in Warzone and MW3Warzone's new map code name leaked and it could be an Africa-themed mapWhat to expect from Liberty Falls in Black Ops 6 Zombies