Can't unlock the '''FInal duty'', sick of numerous attempts.

I have the same problem as well. All you are missing is M249 that you can use in Multiplayer and A single player Gold Assignment badge. No big deal. I stopped playing single player long time ago since it is not worth spending time completing the campaign just to get a badge and a gun.

Have fun playing the Multiplayer modes.

If this message helped you or direct you to the right direction, just click the XP box at the bottom right of the message.

XP = Thanks for helping, trying to help, or what a funny guy.
Accept as solution = This solved my problem!

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@BHLiu11 wrote:

I have the same problem as well. All you are missing is M249 that you can use in Multiplayer and A single player Gold Assignment badge. No big deal. I stopped playing single player long time ago since it is not worth spending time completing the campaign just to get a badge and a gun.

Have fun playing the Multiplayer modes.

If this message helped you or direct you to the right direction, just click the XP box at the bottom right of the message.

XP = Thanks for helping, trying to help, or what a funny guy.
Accept as solution = This solved my problem!

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THe OP wants the M249 and the campaign is the only way to get it.  I had trouble with one of the weapons registering after completing, but I waited a couple of hours and it eventually unlocked in Battlelog and in games. 

Also you can just replay the last chapter two additional times to get the P90 and the QBB-95-1 after getting the M249. 

Yeah, I unlocked the QBS first, and the funny thing is that I got it when I chose the chinese female character (Hannah, was it? Funny name for a chinese...) How do I remmeber it so well after these months? Because I wanted the p90 for my engineer class, and I  read that sacrificng her would give it to me. After that I replayed, because I sitll wanted my p90. I chose the black skinned male character (Irish) and finally got the p90. After some time I felt that I need the machine gun as well, then read more as I didn't know there was this ''surprise'' ending. So I didn't chose any of them, yet didn't get anything either. So, I should of had gotten the machinefun (final duty), but nope...

any progress here?

im having the same probleem to this day