(Old project) Over-under barreled shotgun

This is an older project of mine, one which was recieved well by people i know, but has a good bit of technical flaws. Thought i might as well show it off as i spent a ton of time on this mainly due to lack of experience at that time.
This was also one of the first time´s making an actual weapon, and using subtance painter.

So let me list the technical flaws:
-Each part has its own texture set which largely makes it very unoptimized
-Texture sets wasnt entirely optimized( meaning that it wasnt packed well and tight.
-Modeling could be better at some places.
-A bit of high and lowpoly mixed(pretty visible on the stock if you ask me).

Anything other than the stamp was selfmade.