Quote Originally Posted by Serix View Post
Real gold and diamonds don't glow, they simply refract light. And they're expensive because of their carbon composition and RARITY.
Gold is an element, meaning it doesn't have any carbon in it, your sentence is ambiguous, but I know what you mean.

Also Gold does reflect light, not refract; from wikipedia (the source of all knowledge), "The transmitted light appears greenish blue, because gold strongly reflects yellow and red."

Back on topic: How would you change the shape of the weapons to make them stand out as obviously upgraded? Make them larger? Different colours (metallic blue,etc.)? Elaborate more.

As other people have said, you want your upgrade to be noticeable; glowing although it apparently hurts your eyes shows an upgraded weapon really obviously.