In the description on the ace workshop page you will find a list of all optionals that come with ACE3.Only use the optional components that correspond with your mod-pack. Optional server component is used to load the userconfig files.Optional tracers component brings back ACE2 ball tracers.Optional weapon components make Advanced Ballistics possible, as well as the ability to use ACE3 weapon attachments with 3rd party weapons like RHS, HLC, etc.Optional components supplement 3rd party mods with ACE3 features, for example: If you are a mod creator, please visit the Modularity and PBO Structure page for more information. If you are, consult with your mission maker before installing any of these components. Skip this step if you're not using additional mods.