Yes, this is actually a known issue when using the Call of Duty: Modern Warfare III “Bot Warfare” mod (for the Plutonium IW5 project). You’re not alone in seeing weird unlocks like “everything unlocked” on weapons/attachments/camos, but then finding that they don’t actually work or show up in-game.
Here’s a breakdown of what seems to be going on + what you can try.
The mod may be overriding or “spoofing” your weapon levels/unlocks (showing you “unlocked” but not actually toggling the flags/server-side data that allow equip/display of the attachments).
The client-side UI might show the unlocks while the game engine still requires certain server or profile flags to truly allow equipping/displaying them.
There could be a mismatch between the modded environment and the official progression/unlock logic of MW3 — particularly if the mod is intended for private/custom matches and not meant to fully replicate the official unlock-systems.
The calendar/challenge/unlock system may be disabled or bypassed by the mod, resulting in “unlocked” status even though the game logic doesn’t treat it as unlocked for equip/display.
What you can try:
Since you want to unlock them “on your own”, here are some suggestions:
Use a clean profile or server. If you don’t mind resetting, try playing without the mod (or disable the mod) for a session and see if your unlocks behave normally. That helps determine if the mod is indeed causing the glitch.
Check mod settings/menu. The Bot Warfare mod has its own menu/DVARs (see the GitHub readme) including load-out and rank settings. Maybe there’s a setting that forces “max rank/unlock” behaviour.
Play standard multiplayer/not modded match (if available) or switch to a server that doesn’t use the mod to see if attachments/camos show correctly.
Check for updates to the mod. There might be a known bug or a patch (the GitHub lists versions 2.2.0, 2.3.0) which may address unlock/level issues.
Back-up your profile/unlock data. If possible, export or save your unlock progress so if you have to reset or switch server/mod you don’t lose everything. Or else, contact the mod author or the modding community to see if anyone has a workaround for the issue.