➤ I've always had in my addons collection some CW 2.0 weapons, but on some of them I had this problem: I couldn't reload. So, browsing in the web, I managed to discover the way to fix it!

It's really, really simple. This error occures only when you install an addon called "Mag System - CW 2.0".

If you don't find it, here is the link: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=486217238

Uninstall or disable this and you'll finally be able to reload all of your CW 2.0 weapons.