Jorndel, you are amazing sir, thank you very much
but you forgot 2 things and that is the fact your secondary weapon can also be a second primary weapon (overkill ) and lethal and tacticals as proficiency should also still work.
And for the people who edit their stats:
1. Edit your stats, gun levels, etc..
2. Close hack
3. play a match (each gun you edit, you need to play with it) (private match may work too)
4. leave or finish the match.
hope it helps