Some time ago, I've decided to made Cyberpunk gun based on concept below. It supposse to be low poly model  for gaming purpose. And yeah it's some kind of fan art nothing official.

Software used:

3DS Max 2016

Chaosgroup Vray 3.2

Photoshop

Quixel Suite

xNormal

So, It's high poly model, it contains something around 400 000 faces.

So, next step I made was making low poly version to bake out geometry. As we can see on picture below low poly mesh contains 3832 faces, so in my opinion is pretty low value.

With help of xNormal, photoshop and Quixel Suite, I've prepared textures below. To avoid making bigger textures than 4096x4096, I had to split my mesh.

And It's final version rendered out with Marmoset.

Wireframe for people patient enough to scroll down there :D.

I'm not so skilled in unreal shaders yet, but It looks pretty fine i think, :D