MAG helmet glitch
Like the title says, this is more of a glitch than a cheat. This is for putting any helmet that you ALREADY have unlocked on any armor. It won't work with helmets that are still locked. First go to the Armory. Then change the armor of the class that you want the helmet on to the armor that has that helmet. Press the back button and save you're changes. Go back to the same class again. Change your armor back to what you want it to be, and select headgear that you do NOT have. Press back. Wa-la! You will still have the helmet from the other armor on! I know that this works, I've done it. If it doesn't work something went wrong along hte way, so just try again. This will work for all factions too.
Added by: exploding typhoon Sep 12th 2010, ID#3066