My COBRA zombies are based on the infected from Left4Dead, and were a fun way to use up some fodder. Most of these parts were ones I had laying around, I tried to only use existing fodder for my zombies without having to obtain new parts. They're quick and dirty but I'm pretty happy with how they came out, especially as a set.
The roamer here is just a background filler zombie, done in Cobra colors so he can work as both a civilian zombie or a Cobra-themed zombie. Just your standard shambler!