Solved
Using the support short cut kit, the unlocked mg4 weapon disappeared.
MG4 weapons, which were purchased and unlocked through Steam, were deactivated one day.
Please solve the problem quickly.
- @rlaalstn9601 Check your DLC to make sure that the shortcut kit is still installed. If the shortcut kit is uninstalled you lose access to the weapon until you unlock it the proper way.
