First: copying and pasting the weapon will double its firepower, making some rifles able to penetrate tanks!
Second: Some rifles, for example the main French rifle, its bayonet does not work, even the description of the first bayonet says that it can be placed on that rifle.
Third: The machine gun mounts don't work, the first time I used them they worked, but the second and subsequent ones they didn't work, so I made my own!
That's all for now, any other bugs will be posted here for the developer to take a look at.
Hope you find these bugs and its solutions.
If someone else find a bug, say in the comments and i will try out and put here!