How do you get weapon attachments in the Battlefield Bad Company 2 DEMO?

I c people with the attachments like on the assault rifle and i was wondering how you earned in the DEMO version... thanks for the helpHow do you get weapon attachments in the Battlefield Bad Company 2 DEMO?
There are no attachements in the demo. What you are probably seeing is the other gun they give you in the demo. The only attachment with the assault rifle is the grenade launcher. In the demo, each class gets (1) instant weapon and (1) unlockable weapon. There is also a shotgun that every class can use and comes with c4. There is also a tracer dart everyone can use too. To unlock the weapons, simply play as that class and when you get enough kills, the unlockable weapon becomes available. The maximum level you can reach in the demo is 2, with level 3 being 4,000,000 pts. The demo servers will go down once the game becomes available and your stats do not cross over.How do you get weapon attachments in the Battlefield Bad Company 2 DEMO?
You just got to level up. Then go to the main menu and equip everything.