Very nice, but the light sourcing on the gems is messed up. It looks like the one on the gun is reflecting from a different direction. Otherwise, Very nice job.
I love the udea and have been doing the same thing for a client oh mine for a while now. ( see ID's 37640, 37494, 35161, and 31896) I'm still waiting on the striking scorp's. Really nice greens.
Nice idea, I would have used a mixed scheme with black armour plates and green undersuit, so its a bit more green.
The painting is good, the lining on the black looks a bit harsh, but I'm guessing thats the picture.