parentheses are needed. Change what you have to this

bind "q" "slot1;r_drawviewmodel 0;viewmodel_fov 90"
bind "MOUSE3" "slot2;r_drawviewmodel 0;viewmodel_fov 90"
bind "MOUSE4" "slot3;r_drawviewmodel 1;viewmodel_fov 90"

it fixed the viewmodel part but I still kep switching back to the pistol.

ptt is mouse4, slot3 is mouse4. Try changing that.

http://imgur.com/grLK3TV

so in that link, mumble recognizes the button circled in black as m:mouse 4. In tf2, it rcognizes the button circled in red as MOUSE4. It literally makes no sense but it used to work but then I had to reinstall

Here's a script if you want to press q and it toggles slot1/2

bind q "C1"

alias "C1" "slot1; r_drawviewmodel 0; bind q C2"
alias "C2" "slot2; r_drawviewmodel 0; bind q C1"
alias "C3" "slot3; r_drawviewmodel 1; bind q C1"

bind 1 "C1"
bind 2 "C2"
bind 3 "C3"

still no change

couldn't you just do
bindtoggle q r_drawviewmodels 0 1

and save yourself loads of time?

I fixed it thx everyone for the help

That doesn't switch weapons...

bind q "slot2;slot1"

ez