you might have a mod soup issue, when you are modding things one can easily make a change when forgetting to uninstall a mod which fubars it all up. every modder does it on a regular basis even thou not everyone admits it :O:

its always best to mod things for the stock game and that avoids most conflicts, then in most cases they can be added to any mod without issues.

my guess is the ship you are using for this was already modded by TMO and is now a modification of a modded file.

Have tried it with and without any mods, still black.

Missing gun texture
 

disengage the original gun texture from the gun. make a new material. add the concerning texture as embedded image. do not use the ambiant occlusion map.that`s it.