Jets bought externally show pylons but not weapons?

Ok so I have several jets installed, CJS Typhoon, DC Designs F-15, DC Designs F-4, JustFlight Hawk T1 and the IF F-35.

But when i add weapons in the EFB screen the plane shakes and the pylons appear but they dont have the weapons on them

Now all aside from the F-4 are bought externally. And I know that the F-4 needs a md to show weapons but i thought external planes can show weapons with no issues?