The improved glock aka X13 does not display the scope and grip (Call of Duty: Modern Warfare 2 (2022))

Has anyone come across such a topic that weapons in the modification menu do not display modules when they are installed, as well as characteristics that should change when these modules are installed. I have troubles with X13 aka Glock 18C on it, when I put a stock on which you can install a butt and a handle, the handle and sight are not displayed at all.