Made for a classroom exercise about hard surface modeling for my students.
This one is from a concept from Justin Oaksford made for Halo 5 : https://www.artstation.com/artwork/Bwmvk
Highpoly on ZBrush, Retopology and UVs on Blender, Texturing and rendering on Substance Painter, Baking and rendering on Marmoset Toolbag 3.