The 870 has a special finish not listed anyplace on the remington web site
It has an extended mag tube, ghost rings, Knox nrs spec ops stock.
The finish looks hammered and then it's coated in this strange gray&black coating. Reminds me of the coating you see on high performance car parts like brakes & engine components

Any day I'm above the grass and I'm not a zombie is a good day! JYD#138