The first season of Call of Duty: Modern Warfare 3 is packed with new content for players to experience. Multiplayer fans received a handful of new maps, weapons, and even some new killstreaks this season. Zombies fans have new endgame objectives through the Aether Storm system, and Warzone has made its way to MW3.

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In terms of sheer volume, this is the largest Season 1 content drop any Call of Duty game has seen in recent memory. To help you prioritize which items to unlock first, this guide will explain every new item introduced to core Multiplayer and how to unlock it, ranging from new weapons to this season's unique Aftermarket Parts.

Updated January 27, 2024, by Charles Burgar: Now that Season One is wrapping up, now is a great time for returning players to unlock every new item introduced over the last few months. We've updated this guide to include detailed information on every new item introduced in Season One, including exact unlock requirements and a brief rundown of how each aftermarket part works.

Season 1 Weapons

Modern Warfare 3's first season has five new weapons to earn:

  • RAM-7: Unlocked from the Battle Pass (Sector A7).
  • HRM-9: Unlocked through the Battle Pass (Sector A21).
    • This Sector is unlocked by completing challenges. Tokens aren't required.
  • XRX Stalker: Unlocked through the Battle Pass (Sector A4).
  • Stormchaser: Unlocked through the Battle Pass (Sector A12).
  • TAQ Evolvere: Unlocked through a Weekly Challenge (Week 7).

Once the season ends, all of these weapons will become obtainable through in-game challenges. View the weapon in the Create-A-Class screen to see what the challenge requires.

RAM-7

Category

Assault Rifle

Source

Battle Pass (A7)

Weapon Inspiration

IWI Tavor

The RAM-7 can be obtained from Sector A7 of the Season 1 Battle Pass. It's identical to its MW2019 version, featuring exceptional handling stats for its archetype and a respectable damage profile. Visual recoil on the RAM-7 is quite aggressive, however, so building this weapon for accuracy is highly recommended.

XRX Stalker

Category

Sniper Rifle

Source

Battle Pass (A4)

Weapon Inspiration

Remington MSR

The XRX Stalker is found in Sector A4 of the Season 1 Battle Pass. It is a reimagined version of the original Modern Warfare 3's Remington MSR, a sniper rifle that was renowned for its high base damage and quick rechambering speed. It's statistically comparable to MW2's MJX Imperium, otherwise known as the Intervention.

This weapon has an excellent damage profile that allows for one-taps from the lower torso and up. It also has a fairly quick rechambering speed of 1.6 seconds and ADS time of 610ms, modifiable through attachments.

Stormender

Category

Launcher (Secondary)

Source

Battle Pass (A12)

Weapon Inspiration

Unknown

The Stormender is a new launcher weapon that's available from Sector A12 in the Season 1 Battle pass. This weapon has a battery-powered magazine that fires lock-on EMP rounds, instantly destroying smaller electronics while disabling larger devices. It does no damage to players.

A single shot from the Stormender can destroy player equipment, UAVs, Counter-UAVs, Sentry Guns, and even Cruise Missiles. And since this weapon doesn't fire kinetic projectiles, it never has to reload since its ammo is generated passively. It's the ultimate counter to low-requirement killstreaks and player equipment.

HRM-9

Category

Submachine Gun (SMG)

Source

Battle Pass (Sector A21)

Weapon Inspiration

Beretta PMX

The HRM-9 is MW3's take on the Beretta PMX SMG. This weapon is unlocked by completing every challenge tied to Battle Pass Sector A21. You will need to complete the following:

  • Get 10 operator or special zombie kills while ADS with an SMG.
  • Get 10 operator or special zombie kills while hipfiring an SMG.
  • Get 10 operator or special zombie headshot kills with an SMG.
  • Get 10 operator or special zombie kills while in tac stance with an SMG.

This SMG features a fast fire rate, great damage to the torso, and great range with the right build. It plays identically to the BAS-P from MW2.

TAQ Evolvere

Category

Light Machine Gun (LMG)

Source

Weekly Challenges (Week 7)

Weapon Inspiration

FN Evolys

The TAQ Evolvere is an accurate LMG that can be chambered in 7.62 or 5.56 ammunition, configurable through the weapon's magazine attachment. 7.62 features a higher damage profile but far more recoil and slightly worse handling. It behaves identically to the TAQ rifles seen in Modern Warfare 2.

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Perks And Killstreaks

Season 1 has added one new vest and two killstreaks for players to use in Multiplayer. All three of these items are obtained from the Armory Challenges system, unlocked at Level 25. You will need to track the items through the Armory Challenges UI and complete daily challenges to unlock these new items.

Assassin's Vest

Properties

Immune to UAV and enemy radar effects (including while stationary).

Kills don't display skulls.

Loadout Slots

Equipment: x1 Tactical, x1 Lethal, no Field Upgrade

Perks: x1 Gloves, x1 Boots, x1 Gear

Source

Armory Challenges (3 Daily Challenges)

The Assasin's Vest is acquired through the Armory Challenges system. You must complete three daily challenge objectives to unlock this item. This vest trades your Field Upgrade slot for a buffed version of the Ghost perk.

This version of Ghost does not reveal your location while stationary, making this vest perfect for all stealth builds. It also hides death skulls from enemies you kill to further your stealth effectiveness. Pair this vest with a suppressed weapon to remain completely hidden from enemy radar.

EMP

Properties

Destroys all enemy killstreaks and equipment.

Enemies have no HUD and cannot deploy killstreaks for 45 seconds.

Kill Requirement

13 Kills or 1,625 Score

Source

Armory Challenges (8 Daily Challenges)

The EMP killstreak can be unlocked through the Armory Challenges system, requiring eight daily challenge completions. This killstreak works identically to how it behaved in the original MW2 and MW3. When activated, an EMP will cover the map and destroy all enemy electronics, including any active killstreaks.

After the EMP is used, the enemy team will lose all HUD elements for a short period. This includes team identifiers, making it incredibly difficult to discern friend from foe.

Swarm

Properties

Creates dozens of Mosquito Drones that linger for 45 seconds, targeting any enemies outside.

Players can counter this perk with Hijacked IFF Strobe (Cold-Blooded)

Kill Requirement

15 Kills or 1,875 Score

Source

Armory Challenges (8 Daily Challenges)

Black Ops 2's Swarm killstreak has returned in Modern Warfare 3, obtained from the Armory Challenges system after completing eight daily challenges. While the Swarm has the highest kill requirement out of any killstreak, it also has the highest kill potential out of any MW3 killstreak.

Shortly after calling in the Swarm, hundreds of Mosquito Drones will fill the skies and begin to target enemy players. Any players caught outside and without the Hijacked IFF Strobe will be repeatedly targeted by Mosquito Drones. The swarm lasts for roughly 45 seconds before the drones self-destruct. Excluding Cold-Blooded, the only way to counter the Swarm is with the EMP killstreak.

Aftermarket Parts

Nine Aftermarket Parts are available during Modern Warfare 3's first season, most of which are obtainable through the Weekly Challenge system. Completing five challenges within a given weekly set will unlock that week's listed attachment. These challenges are available until the end of the season, at which point all Aftermarket Parts you missed will be obtainable through an in-game challenge.

JAK Headhunter Carbine Conversion

Category

Conversion Kit

Effect

The Rival-9 now fires in three-round bursts. Greatly increases range and recoil control.

Source

Weekly Challenge (Week 1)

Compatible With

Rival-9

Available from the first Weekly Challenge set in Season 1, the JAK Headhunter Carbine Conversion turns the Rival-9 SMG into a three-round burst rifle. Equipping this conversion kit increases the Rival-9's damage to 39 per shot, decreases the fire rate to 681 rounds per minute, and dramatically increases the weapon's effective range.

JAK Bullseye

Close

Category

Optic

Effect

Adds a low-profile reflex optic.

Source

Weekly Challenge (Week 2)

Compatible With

Most Weapons

The JAK Bullseye adds a 3D-printed iron sight onto your weapon. This optic is off center and is difficult to aim with, making this a safe skip for most players. It takes a weapon attachment to use the JAK Bullseye, so you might as well install an optic with a clearer sight.

This attachment may be unlocked through the second set of Weekly Challenges in Season 1.

JAK Beholder Rifle Kit

Category

Conversion Kit

Effect

Turns the Tyr into a single-shot rifle.

Source

Weekly Challenge (Week 3)

Compatible With

Tyr

Eliminate your enemies at a distance with the JAK Beholder Rifle Kit, morphing the Tyr revolver into a long-range sniper rifle that sits in your secondary slot. It features a much greater range stat at the cost of mobility and attachment options. You can unlock this conversion kit through the third set of Weekly Challenges this season.

KR Intlas LSJ-3

Close

Category

Optic

Effect

Adds a low-profile reflex optic.

Source

Weekly Challenge (Week 4)

Compatible With

Most Weapons

The KR Intlas LSJ-3 is a 4x magnification optic that comes with a pre-built laser. It is roughly twice as effective as similar aftermarket optics, yet this weapon emits a faint sniper glint while ADS and disables Tac Stance. Additoinally, the laser on this weapon is visible at all times.

You can unlock this optic by completing the fourth set of Weekly Challenges this season.

JAK Signal Burst

Category

Conversion Kit

Effect

The Holger 556 now fires in four-round bursts. Greatly increases accuracy.

Source

Weekly Challenge (Week 5)

Compatible With

Holger 556

Holger fans can turn the Holger 556 into a four-round burst rifle with the JAK Signal Burst attachment. This conversion kit allows the Holger to kill an enemy in a single burst, although missed shots will drastically increase your TTK value. The conversion kit also comes with a pre-installed laser and optic.

You can earn this attachment by completing the fifth set of Weekly Challenges during this season.

JAK Ettin Double Barrel Kit

Category

Barrel

Effect

Installs a second barrel onto the AMR9, doubling its damage per shot.

The weapon consumes twice as much ammo, has slightly worse damage, and fires slower.

Source

Weekly Challenge (Week 6)

Compatible With

AMR9

The JAK Ettin Double Barrel Kit allows the AMR9 to fire twice as many bullets per trigger pull by installing a second barrel. This effectively doubles your damage, but this comes at the cost of your range stat, overall fire rate, and your base damage. Even with these drawbacks, the Ettin Conversion Kit makes the AMR9 a powerful close-range weapon for aggressive players.

You can earn this attachment by completing the sixth set of Weekly Challenges during Season 1.

JAK Purifier

Category

Underbarrel

Effect

Adds an underbarrel flamethrower.

Source

Battle Pass (A14)

Compatible With

MW3 Assault Rifles & Battle Rifles

The JAK Purifier is an underbarrel flamethrower that's earned through the Season 1 Battle Pass in Sector A14. This weapon deals fairly low damage per hit and can reach out to eight meters. It has an ammo capacity of 300 and cannot be reloaded.

It's not a particularly strong attachment in Multiplayer, but the flamethrower is a great utility weapon in Zombies. MWZ targets hit by the flamethrower will be temporarily staggered, and each tick of the flamethrower can trigger elemental ammo properties from the installed weapon or the Elemental Pop perk.

JAK Thunder LMG Kit

Category

Conversion Kit

Effect

Turns the Sidewinder into an LMG.

This weapon gains fire rate as you hold down the trigger.

Source

Battle Pass (Sector A21)

Compatible With

Sidewinder

If you can't stand the Sidewinder in core Multiplayer, the JAK Thunder Kit converts this weapon into an LMG with a higher potential RPM. The weapon gains a drum mag and a modified receiver, increasing the weapon's fire rate the longer you hold down the trigger, up to roughly 1,000 RPM after 15 shots. You can earn this conversion kit through a Battle Pass challenge in Sector A21.

JAK BRB

Category

Muzzle

Effect

Substantially reduces recoil.

Your weapon now creates a longer-lasting ping on enemy radar.

Source

Battle Pass (Sector A21)

Compatible With

Most Primary Weapons

This attachment provides an absurd boost to your recoil stats, granting 60% less visual recoil, 40% less vertical recoil, and 20% less horizontal recoil. As a consequence, this attachment causes your minimap icon to become upgraded to an Advanced UAV ping, revealing the direction your character is facing. It also has moderate ADS and sprint to fire penalties.

You can earn this muzzle by completing a Battle Pass challenge in Sector A21.

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