Hey guys check this out, Duracoat just came out with a "Ranger Green" color.  It is a nice shade of olive drab, that is heavily grayed.  Pretty close to both HK and Geiselle OD anodizing.  I've been coating rifles in OD greens for the last couple of years, ordering a bunch of different colors and doing my own custom mixes.  These were inspired by first HK 416's and now Geiselle SD rifles.  I think they must have taken a look at all the different colors I was ordering, mixed them together, and said hey take a look at this, ha ha.