Currently there are 3 'sets' for all classes, I think. Green sets.

Desert Rat for Ops, Sunwalker for Eng, Sandstorm for Commandos. Same with weapons, there are green weapons that are class specific. Wastelander for commandos, strange pistols for ops, not sure in the name for eng.

Anyway, I've only seen these drop from the last map. I got a Wastelander from a chest, seen some of the armors drop from the Guardian.

Are these things only available from the last map? Or anywhere in numa? I've been wanting to do some farming, Outer Limits mostly, but these things are nice to farm as well.