Here are a couple game weapons I made, I plan to attach them to a character soon.
I don't know what the first two things are, but I can see the last picture being a rifle of some sort.
Needless to say, it doesn't look like you've been looking at any references when you textured it.
The metal is way too dark, and doesn't even resemble metal to me. Try to work a bit more on that and lets see again.