I would consider this more akin to weapons / props modeling than hard surface modeling as others have pointed out. You may also consider showing wire frame overlays of both high and low res models if you're looking for critiques on process improvement. For textures, I would consider have your UV layout visible and also a…
That sounds like a threat. :| I kid. I kid. Maybe it's your lighting setup, but everything looks dark. Even for something stylized/hand painted I would look into how you're handling your contrast. Metal is a good way to showcase this. It's very bright when the clean part is exposed to light. Coatings like rust help give…