i'm 99% sure that rail is the Geissele DDC color and not red. it looks like the picture was taken with a flash and reflecting off the rail. just for for thought. that's all.
Its Red I have confirmed it several times and have talk with my contacts at Geissele, They are out there just Rarer than Hens teeth w/Cavities. Maybe a group buy is in Order they were going to offer one in OD as well