Black texture on custom weapon/textureless weapon model

[JinxMontalgo]

I followed LeckerHamster's video series on creating a custom weapon, and apparently I did something wrong along the way.

 

The mesh is fine, the weapon data is there, but the textures aren't, it's just comes up as black and shiny.

 

 

http://i1026.photobucket.com/albums/y326/JinxMontalgo/2015-02-05_00001_zps02a0e22f.jpg

 

 

Any suggestions on how to fix this?