(please post links for downloads)

side note: i am using all of the mods mentioned that are required for this

It could be the SilverIan issue that messes with VJ Base materials. Here is the link to the list of SilverIan addons that can mess with the tank functions.

The other problem would be that the recent VJ Base update broke much of the unofficial VJ Base addons such as Cpt Hazama's Fallout SNPCs.

The uploader of this should know both of the issues at present and he's been working hard to fix them for his addons. He recently fixed the similar issues in Great Britain and France military addons and he will come into fixing the issues present in his other addons. If you do not have any SilverIan materials and the issues still persist then what you can do is to wait until the author gets out a fix for the issues.

i will see if removing a silverlan mod works works the american pack only does it for me, thanks anyways man

I have no silverlan mods but they still won't use their turrets or barrels

Same G-man

I fixed my tanks by going in my Garry's Mod files and deleting every file in the "addons" folder, then relaunching gmod.