For what it's worth the NBC suit depicted on the Eureka figures is not the one piece item shown in cuprum's photo, the OZK. It's actually the heavier two piece version. If I'm not mistaken that was generally issued to specialised chemical warfare units, so it may not be entirely accurate for motor rifles or other infantry types but hey, let's not get too anal about this. They're the only ones out there anyway.
As it happens, I've seen photos that depict this particular suit in a variety of colours from mid tan to the colour depicted on Burkhard's miniatures.
As for the MG, it does appear to be the NSV but one that's been on a diet.