Level 40
Unlock it by playing as a support.
Battlefield 3 does have Co-op mode, you can also unlock weapons for use in Multiplayer from playing Co-op.
in order to unlock it you have to complete the challenge "No russian"? it appears after every game what changes you are working on i have unlocked it
In Battlefield 3 online multiplayer, the player can unlock weapons and other gadets by gaining points. The "C-4 Explosives" unlock for the Support class is unlocked by gaining 4000 score as the Support class.
The Battlefield 3 Limited Edition includes the standard game, but will automatically unlock the 'Return to Karkand' expansion when it launches in December.
Trust me, you'll get so bored with having nothing to unlock. Just save your money and unlock the stuff
The last unlock for every class is the other teams weapon for that class.
You can pick them up from dead soldiers on the battlefield, but other than that, No. Well, not legaly anyway.
You unlock the l96 by completing the recon assignments in the back to Karkand expansion pack
the semi auto version of the p90, the fn ps90 with a 16 inch barrel is legal in texas. you can get a class 3 permit for a full auto p90 with the shorter barrel
You must have veteran status to unlock the FS2000.
Assuming you have Back to Karkand, complete the challenges. There's nothing left to unlock after Eagle. ( and its colonel _Ker-nul_ )