What grey to use on the ROTJ EE3

Hey guys, I recently bagged an original scope. This is to go with my real stock grip, D ring and brass grips and sidewinder kit.

Now I have all the parts I need to get it finished and painted up, is there a grey used that is really close to what was used on screen or indeed a correct colour for the base grey?

Thanks for any help

ive done ROTJ EE-3 's wuth krylon black primer. it has a greyish gun-like color to it. then i dry bfush a little silver over it using model master chrome trim. i then use burnt sienna acrylic for the rusty areas. hope that helps Marcel!