Get the following weapons in your arsenal by completing the indicated task.
Unlock QBU-88 Sniper Rifle:
Unlocked through a unique code which was provided if the game was pre-ordered before June 23rd, 2008.
Download the 'Battlefield: Bad Company' demo version and then select the 'Quick Match' option. Then play a ranked match and get over 23,000 EXP to reach Rank 4.
Unlock USAS-12 Semi-Automatic Shotgun:
When you view your multiplayer stats online this weapon will be available the next time you sign into the game.
Unlock F2000 Assault Rifle:
Register your old Battlefield games at http://www.veteran.battlefield.com/
Visit the website findallfive.com and select the 'Join the Battlefield Community' option and sign up with Electronic Arts. When you then register for the 'Battlefield: Bad Company e-mail newsletter' you will receive a unique code by e-mail which will enable you to unlock this destructive weapon.