MW4 Patch Notes: October 21 Launch Update

Current verified release

October 21, 2026 — Infinity Ward launch patch notes. This is the latest official launch note checked for this page on October 22. It describes changes from the beta to launch; it is not evidence that a later unannounced patch has shipped. Use the official link below for the full text.

Gunsmith and Weapon Prestige

Weapon Prestige re-locks every attachment on the selected gun, including shared ones, and uses classic level unlocks for that gun. Other non-Prestiged guns retain shared attachments. Optic rail position can be adjusted. The announcement discusses weapon and attachment balancing without publishing a full range-by-range damage model; the site therefore does not invent new TTK values.

Maps and modes

Launch includes 20 MP maps; Kill Block starts with 3v3 and 10v10 Gunfight. Inflation involves collecting cash and exposing valuable targets. Hijack uses a carried Data Spike to upload at the opposing station. Collateral is round-based with a buying phase, starting pistol and $800. Combat Outpost is a Ground War control mode. Confirm the live playlist rather than assuming each map supports each mode.

Historical beta notes

The beta note archive ends with the September 1 update. Keep it separate from the October 21 launch notes: an old beta fix or value is not automatically the current launch rule. This page links the guides affected by the verified launch changes.

Sources & version

Source review: October 22, 2026. Official launch patch notes · Historical beta archive