Reaper's Gun from Overwatch

Gun of a character Reaper from Overwatch. I wanted to practise hard surface, uv's and textures for a low poly that smoothed give an effect of a High Poly.
Unfortunately my pc is havig some problems with a graphic card and open gl stuff so I was unable to render that in Arnold, everything tho was prepared (textures, lights) but the render was white since I have some technical problems.... that's why I did it in Key Shot at the end