https://gamesartist.co.uk/bt-spr-300-pro/
3D Weapon Artist Klym Yatsenko breaks down his BT SPR 300 PRO Rifle. In this article, Klym discusses his goals, tools, references, blockout, converting CAD models, high and low-poly modelling, custom normals, UVs, baking, texturing, rendering and post-processing techniques.
https://www.artstation.com/zilagar
https://www.artstation.com/artwork/Za4QA0