Hey there. I don't get notifications for new discussions being created and there already exists a Bug Reports thread that I do check frequently. I recommend you add posts to in the future.

As for missing textures:
First, all required assets are shipped with the addon, unless other files have been tempered with, there should be no missing textures. If there were, you'd see a lot more people complaining.

Second, if you have an visual issues (including, but not limited to missing textures), please try to submit screenshots. Vague descriptions like "missing textures" don't really point me anywhere and worst case all I can say is "it works for me", which isn't getting us anywhere.

What's most likely the cause of the issue, is some other addon changed a model in an odd way and my addon is trying to reference that model, causing issues further down the line.

To test, you can try and temporarily disable all addons except for my weapon pack, load into a map and see if the issues persist. If they do, please post a screenshot or at the very least name the weapon with missing assets, so I know where to look.
If everything is fine, you know that whatever issue you are experiencing is caused by an addon conflict of some kind.