Unlocking everything
Barracks
Section titled “Barracks”On the main menu, select Barracks and then “Unlock stats”. You should now be max prestige, rank 70, with everything unlocked.
Console
Section titled “Console”You can unlock all using the unlockstats command in the console.
You can set a specific rank and prestige using the setPlayerData experience <number> and setPlayerData prestige <number> commands.
See the console guide for more details.