What Comes in the Battlefield 3 “Physical Warfare” Pack?

Don't worry guys! You'll get the "Physical Warfare" pack from DICE and EA whether you preorder Battlefield 3 or not! At some point the game will be updated with the guns shown off in the trailer below. How long do you think it takes to pull out those little legs on the machine gun? I mean, if I'm in the heat of battle, am I going to want to take the time to lay out a picnic blanket so my shirt doesn't get dirty? NO.