I was playing as an engineer in Battlefield 4 last night, and was awarded a "Carbine" unlock. What does that mean? Did I unlock the carbine class of weapons, or just a particular carbine gun?
For example, looking in Battlelog > Profile > Unlocks > Weapons, I see a grid of carbines where one carbine has an orange bar under it, and one carbine has half an orange bar. Is the one with the full orange bar the one I unlocked?
I find the documentation and user interface confusing, as I am new to FPS games.