Title.
I wanted to port the weapon to source filmmaker but upon exporting all the model parts (first person) I've realized that over half of the pieces either don't have a proper texture laying around (as far as I've found) or they're really weird.

For example, the receiver is one model, but it has an upper and lower texture. You can't do this in blender and or the source engine. Am I missing something? I really wanted to port it.