Steampunk Gun

My version of this awesome steampunk revolver by the incredibly talented Kris Thaler. I did not try to follow it exactly as this was more of a learning exercise. I wanted to get more familiar with Substance Painter and Designer. I welcome constructive criticism so please help me become a better artist by pointing out action items I can implement to improve.

You can find the reference for this piece here - https://www.artstation.com/artwork/eaVqP