M9K MethRP Assault Rifles Help

When I am playing MethRP, I can see every M9K Weapon but the Assault Rifles, It is just a big error, I have tried to fix it multiple times, never worked. How can I fix this?

(I have CSS, HL2,TF2 stuff, the CSS is cracked)

Do you have the workshop addon installed?

Windows, yes I do.