No not really, Sauer has it. You can easily make it for AC.
Make new altactions if you awnt.
[SELECT ALL] Code:
sauerzoom = [ getfov = $fov; getsens = $sensitivity; gethudgun = $hudgun; fov 75; hudgun 0; fovratio = (divf 75 $getfov); sensitivity (*f $fovratio $getsens); onrelease [ fov $getfov; sensitivity $getsens; hudgun $gethudgun ] ]