Directions for inputting unlockable codes

(click thumbnails for larger pictures)
Select Multiplayer->Online Game from the main menu.
After passing the agreement and loading screens, select Options->Soldier Loadout from the Online Game menu.
Bring up the Unlock Code keypad by pressing start on the Loadout screen.
Type in your 16 digit code, the 4 blocks of 4 characters can be seperated by spaces or dashes. (You can also use a USB keyboard.)
 
 
 
 
 
 
 
 
 
 
Success! You can now select the item(s) you've unlocked for your character loadout. Press the O button to save & exit.