Well I finally got my guns flat shaded, but onoes its hideous, the tutorial solar posted is confusingly unhelpful to people who have no idea what they are doing, like me, and I can't get anyone to help me, heres examples:
Wow, this looks awesome! ^^

AHHHH WHAT HAPPENED?!

WTF?!

I disabled colorshift... Put the shapes in 1 shading group and disabled auto shade like the tut said, no work, halp.