Pre-order DLC for Battlefield 3 like that of the "Physical Warfare" pack caused mass outrage among fans and prompted a boycott of DICE's military shooter due to the fact that customers had to choose between either getting the Back to Karkand map pack or several exclusive weapons and attachments. The only way to have both was to have pre-ordered Battlefield 3 twice, basically meaning that whichever way you look at it, everyone would be missing out on something.
About two days after the boycott gained mass attention and support, DICE announced that the Physical Warfare pack would be given out for free to everyone sometime later in the year. That time has now come. Confirmed on the Battlefield Blog, the Physical Warfare pack is now available to download on both Xbox 360 and PC and includes the Type 88 LMG, a Flash Suppressor for SKS sniper, immediate access to the DAO-12 Shotgun and Flechette Ammo for said shotgun.
PS3 players are probably smirking away due to the fact that it's been free on the PSN for some time. So yeah, have fun with that Type 88.