Black.
I still don’t know how to clean it. It’s like an AR but different. YouTube has crappy how-to’s you can’t follow very well.
Check the FNforum
http://fnforum.net/forums/fn-scar-17s/28379-reassembling-new-scar-problem-please-help.html
http://fnhusa1.com/manuals/2010_SCAR_16S-17S_OM.pdf