Quote: "That is a "cardboard cutout" as people tend to like to call them, basically, they're too flat on the sides of the model, I do realize that guns are pretty flat but not that flat, try adding a bit more dimension to the model by maybe scaling up/down some of the model parts in the x axis to make it look a bit more interesting and add a few bevels. That's an easy way to make a pretty good looking mesh.
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Quote from another recent thread. Didn't feel like re-typing it.

Alucard94, the member of the future of the past.