Modern Warfare 4 cuts aim assist through smoke and extends the M4’s range
Smoke is a little more useful in Call of Duty: Modern Warfare 4 after Infinity Ward disabled aim assist when firing through it. The November 13 multiplayer update also changes weapon ranges and flinch, including a sizeable range increase for the M4.
The smoke change covers both Smoke Grenades and the Smoke Wall field upgrade. It also applies to gaps created in the smoke by gunfire or explosions, according to the developer.
That does not mean weapons have stopped working through smoke. You can still fire into it; the change concerns the aiming assistance applied when doing so.

The M4 keeps the same damage values, but its maximum-damage range is longer. Image: Activision / Infinity Ward
The M4 reaches farther before its damage drops
Infinity Ward’s November 13 notes raise the M4’s maximum-damage range from 27.94 metres to 35.31 metres, an increase the studio rounds to 26%.

The Axion is among the weapons adjusted in the update. Image: Activision / Infinity Ward
The damage numbers in that table remain 23 at maximum and 19 at minimum. So this is a change to how far the maximum damage carries, not a 26% increase to the damage dealt by every shot.
The update also adjusts other assault rifles. For example, the Axion’s first mid-damage range rises from 38.61 to 40.13 metres, while its listed maximum and minimum damage values stay the same.
For the Hyeon Burst, maximum-damage range increases from 21.34 to 22.86 metres. Its upper-torso and neck multipliers rise from 1.1 to 1.13, and Infinity Ward lists a separate flinch adjustment for that weapon.
Infinity Ward says it is reducing flinch and extending the effective range of many assault rifles and SMGs. Its general assault-rifle adjustment lists a 25.4% reduction in flinch received, unless a weapon has a separately specified adjustment.
Flinch is the movement of your aim when you take fire. A reduction can make it easier to keep your sights on a target, but the notes do not promise that every weapon will feel identical after the update.

The Hyeon Burst also received range and multiplier changes. Image: Activision / Infinity Ward
Wager Match and DMZ receive changes too
The same update raises Wager Match trophy drop rates across multiplayer modes and in DMZ. Infinity Ward also lists fixes for missing Grind token sounds and a visual issue affecting CDL Operator heads at certain distances.
These changes arrive during Season 1, and the full notes contain individual weapon tables. If your usual loadout feels different, I would check its specific entry before assuming it received the same adjustment as the M4.
New players can find the PS5 standard edition at Amazon. Existing owners do not need another copy to receive the game update.
Image credit: Activision / Infinity Ward.
Note: Links to online stores in articles can be so-called affiliate links. If you buy through this link, MIXED receives a commission from the provider. For you the price does not change.
As an Amazon Associate we earn from qualifying purchases.