: Indicates that this specific pack may be hosted within the Modern Warfare III era version of the launcher. : This almost certainly stands for Multiplayer
When a release string like this appears, it usually represents a package that has undergone:
"We want to make sure that everybody starts fresh together, as we move into an all-new experience." — Activision Official Statement
The string represents a highly specific scene release filename typically found on PlayStation 4 (PS4) homebrew, modding, and piracy networks. In the console modding community, filenames structured with specific product IDs (like CUSA23827 ) and game title overlaps (like Black Ops 6 and MWIII ) carry critical technical implications regarding how modern console games are packaged, spoofed, and run on modified hardware.