There is something wrong here...
With an Alpha Bridge build and a Famas weapon when I switch from Famas to secondary weapon and then switch back to Famas my dps drops down (from 345k to 305k) and it stays like that (have to change famas for another weapon and change back (to get again 345k dps)..
It happens all the time...
So after testing at the shooting range I can tell its not only UI related, sadly :/
Here the link to the new thread w/ better info about it : click me