As a dedicated player navigating the ever-evolving landscape of Call of Duty: Modern Warfare 3 in 2026, I find myself diving headfirst into the challenges of Week 6. The seasonal cadence remains a thrilling constant, offering fresh objectives across Multiplayer, Zombies, and Warzone that promise not just massive XP windfalls but also coveted new gear. This week, the prize is the JAK Backsaw Kit for the Holger 556, an attachment that promises to fundamentally reshape the weapon's identity. The grind is real, but the reward—a tool that transforms a standard rifle into a unique, high-capacity duelist—is the kind of meta-shifting carrot that keeps the community engaged year after year.

The Crown Jewel: JAK Backsaw Kit

Completing any five challenges from this week's slate unlocks the JAK Backsaw Kit. This isn't just another muzzle attachment; it's a full conversion kit that turns the Holger 556 into a beast of a different nature. Like a synchronized pair of pistons firing in perfect unison, the kit makes the rifle fire two bullets simultaneously. However, this comes with a significant trade-off. The twin rounds have a small gap between them, leading to severe spread when firing from the hip or in tactical stance, making it about as precise at close range as a garden hose on full blast.

The stat adjustments are substantial:

• Damage Reduction: ~24%

• Fire Rate Reduction: 20% (down to 472 RPM)

• Magazine Increase: A massive 100-round drum

On paper, the damage per second (DPS) nerf looks like a death sentence. Yet, in practice, if you can land those paired shots on an opponent's upper torso, the weapon can eliminate foes in just three bursts—a potential TTK (Time to Kill) that rivals many meta weapons. The kit compensates with enhanced agility, granting faster ADS speed, sprint-to-fire speed, and overall weapon mobility. It transforms the Holger from a lumbering support weapon into a mobile, high-capacity assault rifle, a metamorphosis as dramatic as a caterpillar becoming a swift, predatory hawk.

Conquering the Multiplayer Arena

The Multiplayer challenges are a diverse test of skill and loadout optimization. Here’s the full breakdown for Week 6:

Challenge	XP Reward	Pro Tip
Get 15 hipfire kills with a recommended assault rifle.	2,500 XP	Look for the flame icon in Create-A-Class. Use the Bruen Bastion Angled Grip and a hipfire laser.
Get 10 double kills with recommended SMGs.	5,000 XP	Play small maps or objective modes like Hardpoint for quick multi-kills.
Get 10 hipfire kills with recommended LMGs.	5,000 XP	LMG hipfire is tricky. Use the aforementioned attachments and play very aggressively in close quarters.
Get 20 tac stance kills with recommended LMGs.	5,000 XP	The Cronen Intals MSP-12 optic is a hybrid sight that also functions as a tac-stance laser.
Get 30 hipfire kills with recommended SMGs.	7,500 XP	This is a grind. Stick to maps like Shipment or Meat for constant close-quarters combat.
Get 20 kills while ADS with a recommended shotgun.	7,500 XP	“ADS” means Aiming Down Sights. Use slug rounds or range attachments to make your shotgun effective at medium distance.
Get 15 point blank kills with the Holger 556.	10,000 XP	This directly prepares you for the Backsaw Kit's intended playstyle. Rush enemies and don't be shy!

Surviving the Undead Hordes (MWZ Challenges)

The Zombies mode, MWZ, offers its own brutal set of trials. These often require specific weapon rarities and upgrades, making preparation key.

Weekly MWZ Challenge List:

1. Get 250 kills in full-auto mode with a recommended battle rifle. (2,500 XP) - Simple but time-consuming. Find a high-traffic area and hold the trigger.

2. Get 150 kills with a Pack-A-Punched Longbow. (5,000 XP) - The Pack-A-Punch machine is your best friend. It turns the Longbow into a powerhouse.

3. Get 250 critical kills with a Pack-A-Punched recommended weapon. (5,000 XP) - Aim for the head! This challenge rewards precision.

4. Get 250 kills with the Haymaker at Epic (purple) rarity or higher. (5,000 XP) - You'll need to find a higher-rarity version of this shotgun or use a Rare Aether Tool to upgrade one.

5. Get 5 special zombie critical kills with a recommended weapon. (7,500 XP) - Target Mimics, Disciples, or Manglers. Isolate them and land those crucial headshots.

6. Get 300 kills with a Pack-A-Punched Holger 556. (7,500 XP) - A perfect warm-up for the Backsaw Kit you're about to unlock. It turns the Holger into a zombie-shredding machine.

7. Get 250 kills with a silenced recommended battle rifle. (10,000 XP) - Stealth in Zombies? It's more about the attachment requirement. Equip a suppressor and go to town.

A key strategy for these challenges is to always Pack-A-Punch your weapon when possible. It dramatically increases damage and often adds ammo mods or unique effects, making high-kill challenges much faster. Think of a Pack-A-Punched weapon not as an upgrade, but as a larval weapon undergoing its final, violent metamorphosis into its true, devastating form.

Dominating the Warzone Battleground

For us Battle Royale enthusiasts, Week 6 focuses heavily on the classic map Fortune's Keep, which has seen a glorious resurgence in the 2026 playlist rotation.

Challenge	XP Reward	Key Note
In Warzone, get 40 kills or assists with a recommended weapon.	2,500 XP	Assists count! Play supportively in squad modes.
In Fortune's Keep, open 20 loot caches in the northern region (Gatehouse, Keep, Terraces).	5,000 XP	Must be on Fortune's Keep. Land north and loot aggressively.
In Fortune's Keep, open 20 loot caches in the eastern region (Konni Outpost, Lighthouse, Pier, Winery).	5,000 XP	The eastern shoreline is a great, often less-contested route.
Complete 15 contracts in Warzone.	5,000 XP	Focus on Safecracker, Intel, or Bounty contracts for relative speed and safety.
In Fortune's Keep, open 20 loot caches in the southern region (Ground Zero).	7,500 XP	Ground Zero is hotly contested. Be ready for early fights.
In Fortune's Keep, open 20 loot caches in the western region (Graveyard, Overlook, Town).	7,500 XP	Town is a loot-dense area perfect for this challenge.
In Warzone, place in the top ten 5 times.	10,000 XP	Prioritize positioning and survival over aggressive pushes.

The cache challenges are a marathon, not a sprint. I recommend loading into Fortune's Keep with the sole intent of looting, treating the map like a intricate clockwork mechanism where you're methodically winding each section by opening its caches. Play cautiously, avoid prolonged fights, and rotate between matches to hit different regions. Remember, the recommended weapons are always marked with a distinctive flame icon in your loadout menu, so be sure to select one before dropping in.

Final Strategy & The 2026 Grind

As we push through 2026, the weekly challenge system remains a brilliantly addictive core loop. My personal strategy for efficiently unlocking the JAK Backsaw Kit this week is to mix and match the easiest objectives:

1. Start in Zombies: The "300 kills with a Pack-A-Punched Holger 556" and "250 kills with a silenced battle rifle" are straightforward, if grindy, in a single good deployment. This could net two completions.

2. Jump into Multiplayer: Focus on the "15 point blank kills with the Holger 556" and the "10 double kills with SMGs." These can be done relatively quickly in fast-paced playlists.

3. Finish in Warzone: The "40 kills/assists" and "15 contracts" challenges are very achievable over a few gaming sessions and don't require specific map rotations.

By targeting just five of these, the powerful JAK Backsaw Kit will be yours. It represents the ongoing evolution of Modern Warfare 3's sandbox—a tool that demands a new playstyle and rewards mastery. Whether you're mowing down zombies with its 100-round magazine or outmaneuvering opponents in multiplayer with its newfound agility, this week's reward is a testament to the game's enduring depth. Now, if you'll excuse me, I have some caches to find and a new kit to test on the battlefield. The grind never ends, and in 2026, I wouldn't have it any other way.