https://gamesartist.co.uk/elcan-specter/
3D Artist Ilya Kozyrev breaks down his Elcan Specter DR sight. In this article, he covers references, high & low-poly modelling, UVs, baking, scene setup, metallic & roughness texturing with hand-painted wear, rendering & post-processing.
https://www.artstation.com/ilya_kozyrev
https://www.artstation.com/artwork/4NZNPn