Putting it succinctly, I like this final design. I can see you took my advice in some areas, adding amour to the anti-air guns while not making it like a dome and so keeping with the overall design of the ACU.
It looks to me like you scaled the gun up a bit on this final design too, and I think that suits it better, as it fits more with the UEF view of having a big gun, and looks like it would pack a substantial punch.
The colour scheme is also a little different to previous, 'canon' styles, and black coat with blue highlights suits it well, especially the way it has been used. White for the logos make them stand out as well, and if I'm frank I just generally like a white/black contrast on things.