Season after season, the grind never stops for dedicated Call of Duty: Modern Warfare 3 operators. Now in 2026, the game's third seasonal week is live, bringing with it a fresh set of challenges and a highly coveted prize for those willing to put in the work. The star of the show this week is the JAK Cutthroat stock, the first-ever aftermarket stock introduced in MW3's lifecycle. Completing just five of the newly available challenges—whether in Multiplayer, MWZ, or Warzone—will secure this game-changing attachment. For aggressive players who live by the mantra of 'speed is life,' the Cutthroat is less of an attachment and more of a metamorphosis, turning your assault rifle or SMG into a blur of motion on the battlefield. Think of it as strapping a nitro booster to a panther—you're trading some stability for the raw, exhilarating power of unparalleled agility.
The Week 3 Grand Prize: JAK Cutthroat Stock
Once you've ticked off five challenges, the JAK Cutthroat stock is yours. This isn't your average, run-of-the-mill attachment. While it comes with the expected trade-offs of reduced recoil control and increased aiming idle sway, what it offers in return is nothing short of revolutionary for movement-based playstyles.
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Strafe Speed Boost: Delivers a massive 27% increase to strafe speed. To put that in perspective, most mobility attachments offer a modest 8-15% bonus. The Cutthroat is in a league of its own, making your side-to-side movement as slippery as an eel in oil.
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Platform Compatibility: Currently, this powerhouse can only be installed on specific weapon families:
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M4 Platform
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MTZ Platform
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AMR9
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Best Use Case: Perfect for SMG rushers and AR players who favor an aggressive, close-to-mid-range dueling style. It turns your weapon into a strafing menace, allowing you to dance around enemy fire like a matador evading a bull.
Multiplayer Challenges Breakdown
Time to jump into the core playlists and start grinding. Here are the challenges waiting for you in standard Multiplayer, complete with pro-tips for swift completion.
| Challenge | XP Reward | Pro-Tips & Tricks |
|---|---|---|
| Get 15 kills after reloading with recommended SMGs. | 2,500 XP | ✅ Use the Mag Holster perk to drastically cut reload times. Camp ammo crates in objective modes for constant reloads. |
| Get 8 headshot kills with recommended handguns. | 5,000 XP | ✅ Play Hardcore modes for one-shot headshot potential. Use a tactical laser for better hip-fire accuracy up close. |
| Get 5 kills with a gun-butt of a recommended weapon. | 5,000 XP | ✅ Equip the S-37C DL Breacher Device underbarrel for guaranteed one-hit melee kills. Flank and surprise! |
| Get 15 kills against blinded/stunned enemies with recommended SMGs. | 5,000 XP | ✅ Load up on Stun Grenades or Flashbangs. Play small maps like Shipment for easy target acquisition. |
| Place at the top of the scoreboard 3 times. | 7,500 XP | ✅ Focus on objective play in Domination or Hardpoint. Captures, defends, and kills all contribute heavily to score. |
| Get 2 kills in a row without taking damage with a recommended SMG 5 times. | 7,500 XP | ✅ Patience is key. Play tactically, use cover, and disengage from unfair fights. |
| Use your Lethal to kill 5 enemies affected by a Shock Stick. | 10,000 XP | ✅ Stick an enemy with a Shock Stick and immediately follow up with a Semtex or Frag Grenade. Team coordination helps! |
Remember: Recommended weapons are marked with a fiery icon in your Create-A-Class menu. The SMG challenges are generally considered the fastest to complete.
MWZ (Zombies) Challenges Breakdown
For those who prefer fighting the undead hordes, MWZ offers its own path to the Cutthroat stock. These challenges are perfect for efficient players looking to stack progress.
| Challenge | XP Reward | Pro-Tips & Tricks |
|---|---|---|
| Get 5 rapid kills 20 times with a recommended SMG. | 2,500 XP | ✅ This is a freebie. Find a zombie train in the Low Threat zone and mow them down. |
| Get 150 critical kills with a recommended pistol. | 5,000 XP | ✅ Aim for the head! Pack-a-Punch your pistol for better damage and ammo capacity. |
| Get 50 melee Mercenary kills with a recommended weapon. | 5,000 XP | ✅ Infested Strongholds are crawling with Mercenaries. Clear them out with your melee weapon equipped. |
| Get 200 fire damage kills with a recommended SMG. | 5,000 XP | ✅ CRUCIAL: You must use Napalm Burst ammo mod, NOT incendiary ammunition attachments. This is a common pitfall! |
| Get 10 Mangler kills with a recommended weapon. | 7,500 XP | ✅ Manglers frequently spawn at Exfil points, especially in the final 15 minutes of a match. |
| Get 100 kills in a single deployment 5 times with a recommended weapon. | 7,500 XP | ✅ Another easy one. Just survive and keep killing in any zone. |
| Get 50 Hellhound kills with a recommended weapon. | 10,000 XP | ✅ Hellhounds are plentiful in the Medium and High Threat zones. They often spawn in packs near Aether Nests. |
Efficiency Expert Strategy: Combine challenges! Take a recommended SMG loaded with Napalm Burst into the Medium Threat zone. You can simultaneously work on the 5 rapid kills, fire damage kills, and special zombie kills (Manglers/Hellhounds) in one focused deployment. It's like conducting a symphony of destruction where every element plays its part.
Warzone Challenges Breakdown
For the battle royale specialists, Rebirth Island and its surrounding chaos are your playgrounds this week.
| Challenge | XP Reward | Pro-Tips & Tricks |
|---|---|---|
| In Warzone, open 75 loot caches. | 2,500 XP | ✅ Play Plunder or Resurgence. Focus on looting buildings rather than fighting early on. |
| In Rebirth Island, get 15 kills in the NW region (Dock, Control Center). | 5,000 XP | ✅ Hot-drop in these areas. Control Center is a perennial hotspot for action. |
| In Rebirth Island, get 15 kills in the SE region (Stronghold, Living Quarters). | 5,000 XP | ✅ Stronghold offers verticality and lots of loot, making it a great place to gear up and fight. |
| In Warzone, revive a teammate 15 times. | 5,000 XP | ✅ Play with friends! Even repeatedly reviving the same teammate in Resurgence counts. Be the squad's guardian angel. |
| In Rebirth Island, get 15 kills in the NE region (Bioweapons, Harbor, Chemical Eng.). | 7,500 XP | ✅ These are larger, more spread-out POIs. Consider a longer-range loadout for engagements here. |
| In Rebirth Island, get 15 kills in the center region (Prison HQ, Factory). | 7,500 XP | ✅ The heart of the map and often the final circle. Mastering these interiors is key. |
| In Warzone, place in the top ten 7 times. | 10,000 XP | ✅ Adopt a more tactical, positioning-focused playstyle. Avoid unnecessary early fights and rotate smartly. |
Mode Recommendation: Resurgence is your best friend for most of these. The fast-paced, respawn-enabled action makes getting region-specific kills and revives far less punishing than in standard Battle Royale. Knocking out the 75 loot caches is also faster when you're not worried about permanent death on your first landing.
Final Strategy & Wrap-Up
The path of least resistance to the JAK Cutthroat stock is clear: mix and match. You don't need to suffer through the hardest challenge in one mode. Here's a foolproof, fast-track plan:
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Start in MWZ: Complete the easy "5 rapid kills 20 times" and "100 kills in a deployment 5 times" with a recommended SMG. (2 challenges done).
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Jump into Multiplayer: Focus on the straightforward "15 kills after reloading" and "8 headshot kills with handguns" challenges. (2 more challenges done).
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Finish in Warzone: Hop into Resurgence and focus on the simple "revive a teammate 15 times" challenge. Play support for your squad and secure that fifth and final challenge.
By 2026, the Modern Warfare 3 meta is all about hyper-specialization and movement. The JAK Cutthroat stock isn't just another attachment; it's a statement. It declares that its user values the fluidity of motion over static defense, choosing to be an unpredictable, streaking comet across the screen rather than a stationary target. Unlock it, master its flow, and watch as your opponents' aim struggles to keep up with your newfound speed, their crosshairs trailing behind you like a spectator trying to follow a hummingbird's flight.