How do you get the 1.4 weapons and possibly 1.5 (if there are those) weapons unlocked on Battlefield 2?

I'm sergeant with 3 or 4 of the original weapons but I cant figure out how to get the newer ones unlocked.How do you get the 1.4 weapons and possibly 1.5 (if there are those) weapons unlocked on Battlefield 2?
You need to play a round of the Special Forces expansion pack, either on your computer or someone elses using your account.How do you get the 1.4 weapons and possibly 1.5 (if there are those) weapons unlocked on Battlefield 2?
You need to play at least 1 round on the Special Forces Expansion pack. You need to buy the expansion pack or play at a friend's house with your account.

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