Its a very nice job, as the other guy said, great theme all kept relative!.
The defensive area you show(3rd pic), though the windows shape and sizes go with the theme, it looks all abit too easy for grenades to be thrown in without much accuracy then again suppose you counter that with just how many defensive holes there are.
Oh yeah, you know the bridge that links the two defensive posts, maybe have abit of a 'front lip' so there is alittle bit of cover, even if its only enough to cover half the height of a engineer or soldier etc, high enough to not be used for a sg but a good spot for dispenser etc. Only really suggesting it as with how open that area is for attackers
