This mod is focusing on fixing the lighting issues with some of the viewmodels aimed towards the freshly updated character models (with their new UV's). This mod fixes triangulation problems on some of them (applies to clover and bonnie too).
This mod won't work on sydney and tony because they are placed in different locations and there would be a conflict resulting in a game crash.
For example please take a look at the image in the mod preview section, you'll notice the trianguling faces which are caused by the lighting, which in this case the fixed version eliminates the triangulation issues and prevents small triangles around the source of light.
Viewmodel being used in the preview is Jacket's Model