Hello LuckyDog ^^
I think that you could have worked a little bit more the metallic parts, as they almost look like basecoated. You can treat them the same way that textiles, adding shadows and highlights, I learnt this here a few months ago... before I just painted and whashed them over. Try it, it's worth for sure and you'll have a ton of fun more. The base looks a bit bulky... take a second look at it I think you'll see what I mean.
On the other hand the face looks pretty good, also the wings on the pectoral plate and the gun look pretty good too.
I really hope this comment will be helping you, keep on painting!!! ;)