I know my idea is a little copy cat of SOCOM and AA, and it would add some possible imbalance issues, but just think about it. BF2 with weapon attachments, but you have to unlock each individual attachment. The way you configure your weapon set up's (set up 1, setup 2, set up 3) is through your BFHQ section on your Main Menu.
Also, you may not have a scope and a grenade launcher of any type on your weapon set up at the same time.
Also, you may not have a scope and a grenade launcher of any type on your weapon set up at the same time.