All S4 Week 4 Challenges: How To Unlock the JAK Thumper 656 In MW3 & Warzone
The JAK Thumper 656 is the newest aftermarket upgrade available for Modern Warfare 3 and Warzone players as of Week 4 of Season 4.
This conversion kit enhances the RGL-80 grenade launcher with an “improved long barrel,” allowing it to fire projectiles at higher velocities and longer distances. Additionally, it makes the weapon compatible with three different types of grenade projectiles: Slug, Sticky, and Drill Charge.
Here’s how you can easily get your hands on the JAK Thumper-656 kit in Call of Duty: Modern Warfare 3 and Warzone Season 4!
How to Get the New JAK Thumper-656 Kit in MW3 & Warzone
To unlock the JAK Thumper conversion kit for the RGL-80 grenade launcher, players must complete any five weekly challenges from Week 1 of Season 4.
Each mode—Multiplayer, Zombies, and Battle Royale (Warzone)—offers seven challenges, giving you a grand total of 21 challenges to pick from. Simply ace any five of these challenges, and voilà! The RGL-80’s JAK Thumper Kit is yours as the final reward!
All Call of Duty: Season 4 Week 4 Challenges
Below is a quick rundown of this week’s challenges across each mode:
| MULTIPLAYER | ZOMBIES | WARZONE |
|---|---|---|
| 10 Kills against Operators who are Blinded or Stunned. | Get 300 Kills with Frost Damage with a Recommended Weapon. | Get 10 Operator Kills or Kill Assists with a Recommended Weapon. |
| Get 10 Operator Kills with a Bomb Drone or Mosquito Drone. | Get 300 Explosive Damage Kills with a Recommended Weapon. | In Urzikstan, Open 20 Loot Caches in the Eastern Region Military Base (Military Base, Farms). |
| Get 20 Operator Kills while using Explosive Ammo. | Get 300 Fire Damage Kills with a Recommended Weapon. | In Urzikstan, Open 20 Loot Caches in the Central Region (Old Town, Low Town). |
| Destroy 8 Aerial Killstreaks. | Destroy 15 Counter UAVs in Mercenary Camps. | Complete 15 Contract(s). |
| Place top of the Leaderboard 3 Times. | Get 2 Warlord Kills with a Recommended Weapon. | In Urzikstan, Open 20 Loot Caches in the Southern Region (City, Suburbs, Manor). |
| Get 3 Operator Kills after Death. | Get 50 Kills with a Recommended Melee Weapon while Frenzied Guard is Active. | In Urzikstan, Open 20 Loot Caches in the North-West Region (Resort, Power, Seaport, Cargo). |
| Get 3 Operator Double Kills with Grenades or Launchers. | Get 5 Kills with a Monkey Bomb 5 Times. | Place in the top 10 5 time(s). |
Once you’ve completed your selected challenges, the JAK Thumper-656 Kit will be unlocked for your RGL-80. You can then equip it from the Blacksmith in your preferred playlists across both Modern Warfare 3 and Warzone.
