Call of Duty: MW4 Launch Patch Notes - TTK Changes, Perk Tuning & More

• Primary Subject: Call of Duty: Modern Warfare 4
• Key Update: The launch patch notes for MW4 have been released, detailing all changes made since the beta.
• Status: Confirmed
• Last Verified: October 22, 2026
• Quick Answer: The MW4 launch patch notes detail TTK changes, perk tuning, bug fixes, and more.

The wait is pretty much over, with Call of Duty: MW4's multiplayer now rolling out across the regions. After all the learnings from the beta, Infinity Ward has made some changes to the game based on player feedback.

These changes are reflected in the recently released launch patch notes, where we can see what was adjusted or modified. Before you dive into multiplayer, here is all the important information.

Call of Duty: MW4 Launch Patch Notes

The launch patch notes for Call of Duty: MW4 detail what the developers focused on in the past weeks after the beta. For starters, the TTK is a controversial subject on social media, and the developers spent countless hours testing this to get it right.

Credit: Activision

As promised, some perks were adjusted, and the biggest winners are Battle Hardened and Resupply, since both have received a buff. UI and audio improvements were also implemented to enhance the experience.

Here is a summary with only the important details from the patch notes:

Weapon Tuning

SMGs are now more efficient in close to mid-range combat, powerful one hit kill weapons are tempered with flinch and damage tuning, and all weapons have had a deep balance pass to ensure the weapon you pick is a choice, not a requirement. 

We have also combed through all our attachments and tuned them to make sure Gunsmith allows flexibility and balance. Advanced Weapon Stats are also available at launch, so you’ll know everything you need to make the right choice for your playstyle. 

Weapon Progression

Since the Beta we have worked to improve how weapon progression displays weapon unlocks instead of weapons levels. We’ve also improved the visualization of weapon progress after a match to more clearly represent a how progress is skipped with shared attachments. 

Optic and Reticle Customization

We have added a new Optic Rail Placement feature in Gunsmith that allows you to tailor your weapon’s ADS sight picture exactly to your preference.  

Perk Placements

Since the Beta, we've reconfigured our Perk distribution to better balance the categories and to keep interesting player choices between speed, durability, utility and stealth.  

Here’s where we landed for launch: 

Perk 1 

• Quick Fix 
• Overkill 
• High Alert 
• Ghost 
• Resupply 
• Kill Chain 

Perk 2 

• Hardline 
• Blood Rush 
• Bomb Squad 
• Fast Hands 
• Ninja 
• Birdseye 

Perk 3 

• Lethal Reach 
• Combat Grid 
• Battle Hardened 
• Scavenger 
• Tracker 
• Cold-Blooded

Perk Tuning

We’ve buffed some Perks based on Beta feedback: 

• Battle Hardened will now more effectively negate most of the effects from Tactical grenades like the Flash, Concussion, and Screamer Mine. 
• Resupply has been buffed to provide your first recharge faster. 
• Blood Rush has been updated so that pressing the sprint key automatically triggers Tactical Sprint by default. If you prefer to manage this directly, head towards the Movement Advanced Settings to adjust it. 

Player Movement

Since the Beta, we have focused hard on making sure transitions between actions are balanced, feel grounded, and allow a clear benefit at a clear cost. The results are smoother movement that feels more authentic than ever before. 

Another area we have focused on improving is how enemy players move. We found several bugs where the third-person and first-person experience did not match, misrepresenting the enemy’s actions, creating some unrealistic looking movements, and allowing a few snaking opportunities. All the issues we identified have been fixed, and we will carefully monitor for any additional changes. 

Lastly, we have kept the change from Beta to make Tactical Sprint not available by default. 

Multiplayer Spawns

Spawn work has continued since the Beta, including further iteration on the changes we made to player separation, squad spawning, and Hardpoint spawn predictability. Spawns have been reoriented around consistent flow and making sure you’re never far from the fight. 

Killstreaks

While the team is happy where most of these landed in the Beta, two specific changes have been made for launch: 

• UAV health has been increased from 100 to 150, following feedback that UAVs were too easy to shoot down after their health was reduced during the Beta.  
• Wheelson pathing and targeting logic have been reworked to be more aggressive and prevent confusion when targets change quickly. 

Equipment

Tacticals

• Flash and Concussion effective range and duration have been slightly reduced. 

UI/UX

• Improved communication around Shared Attachments (see above) 
• Reduced or eliminated pre-game countdown timers that had been originally intended to give previous generation consoles time to load 
• Added logic to start pre-loading maps earlier to avoid slowdowns waiting for the map to finish loading 
• Gameplay Improvements 
  • Reduced blur size on splashes to improve gameplay visibility 
• Gunny 
  • Improved the positioning of Gunny tutorials 
  • Reduced the notifications you get about Gunny 
  • Gunny got a facelift! 
• Weapon Builds 
  • Weapon Builds were previously automatically saved when players left the Gunsmith, flooding their Build list. Weapon Build saving in Gunsmith is now a manual process. 
  • Weapon Builds edited in-match are now automatically saved. 
• Various minor improvements and fixes to the front end 

Audio

• Added missing destruction audio for various destructible objects across Multiplayer maps. 
• Fixed an issue where mounted vehicle turrets were missing audio. 
• Fixed an issue where Heartbeat Sensor pings could become muted underwater. 
• Added audio cues when sending and receiving text messages. 
• Fixed issues causing audio dropouts when using the Assault Drone and Bomb Glider. 
• Adjusted the audio mix and audible distances for the Chopper Gunner and its weapons. 
• Updated Gunship audio to improve the overall Killstreak experience. 
• Improved the Nuke sequence audio mix and fixed issues causing audio dropouts. 

Bug Fixes

Multiplayer

• Fixed a server crash that could occur during Multiplayer matches. 
• Fixed various visual issues on Cachette. 
• Fixed an issue where the Seeker Drone could incorrectly deploy out of bounds and be destroyed in certain areas of Multiplayer maps. 
• Fixed an issue where the Killstreak counter could reset after using the Argonaut. 
• Fixed an issue where match completion events were not being properly recorded in Multiplayer and DMZ. 

DMZ

• Addressed on Oct. 20: 
  • Addressed various crashes and stability issues, including a crash when breaching the door in Breaking New Ground. 
  • Fixed an issue where the After-Action Report could incorrectly display 0 XP earned after a player's first match. 
  • Fixed an issue where the ISO Apex Attachment would not function as intended in DMZ. 
  • Fixed an issue where players could get double completion credit for story missions. 
  • Fixed an issue where enemy AI could move into unintended areas when a player was downed during Breaking New Ground. 
  • Fixed some instances where enemy AI could run over players while infilling. 
  • Fixed an issue where some Dynamic Operations “find the keypad codes in safes” could appear in locked spaces. 
  • Fixed an issue where only the player who dealt the final blow to a Commander received XP and progress toward the “King Slayer” Calling Card when playing in a squad. 
  • Fixed an issue where the Impact Smokes Pro Trait would not activate when a player was downed. 
  • Fixed some incorrect DMZ Orders description text. 
  • Fixed an issue where shadows could visibly pop in and out when moving around the FOB. 
  • Fixed an issue where the tablet screen could fail to turn on after searching the crashed drone in Breaking New Ground. 
  • Fixed an issue on where a missing prompt could prevent players from progressing the Chemical Denial Dynamic Op at NuriGO Mall on Nintendo Switch 2. 
  • Fixed an issue where the Gunsmith Attachment menu could remain stuck onscreen during deployment. 
  • Fixed an issue where players could not purchase saved Blueprint modifications on Nintendo Switch 2. 
  • Fixed some areas where players could get stuck in the rocks in Hajin.  
  • Fixed an issue where players could not equip an Active Duty Operator in their Showcase. 
  • Fixed an issue where selecting Untrack Recipe with no recipes tracked at the 3D Printer could kick the player out of the FOB. 
  • Fixed an issue where selling starting equipment or dismissing Active Duty Operators with starting equipment equipped before your first deployment could result in a soft lock. 
• Addressed on Oct. 21: 
  • Fixed an error that could occur when opening the Dog Tag Case. 
  • Fixed an issue where the Toxic Intercept Op could incorrectly fail after completing the Defend the Bomb objective. 
  • Fixed a performance issue on PC when holding a Heartbeat Sensor with a weapon equipped. 
  • Fixed an issue where AI enemies could run over players during infiltration in NK Wilderness. 
  • Fixed an issue where Dynamic Operations text could display incorrectly when Menu Text Size was set to Larger or Largest. 
  • Fixed an issue where the Orders rewards section of the End Game Report could appear in low resolution. 
  • Fixed some unintended voice lines during Breaking New Ground. 

Weapons

• Fixed an issue where the Firing Range could incorrectly display a 0.00 TTK for the Rezi 12 Shotgun. 
• Added weapon level icons to Melee and Launcher weapons. 

Campaign

• Fixed a progression blocker in the Hotel sequence of Counter Attack. 

UI/UX

• Several hundred bugs. Killed dead.  

READ MORE: Call of Duty: MW4 - What Is Enhanced FOV?

Call of Duty: Modern Warfare 4 is available for PlayStation 5, Xbox Series X|S, Nintendo Switch 2, and PC through Steam and Battle.net.

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