so, i've read this link about the weapons in the special forces patch and i've read a few others. i've got bf2 and the expansion, got the option for an upgrade and i still can't unlock the fn 2000 although the fal is already unlocked. what do i have to do to get the other weapon upgrades open? i was under the impression that to unlock tier 2, you just need to unlock the underlying tier 1 weapon?