This was part of my entry for the ArtStation Wild West Challenge - category Prop Art rendered.
It depicts a fictional riding device for short distances, powered by two pneumatic cylinders on the rear, primarily used by the US cavalry before the project was eventually cancelled due to too many deadly accidents.
Everything modelled and textured in Blender, as usual semi-procedurally with tiling textures and some occasional UV's. Minor color corrections in Photoshop.

Link to the entry: https://www.artstation.com/contests/wild-west/challenges/40/submissions/30565?sorting=popular