Mine arrived in the mail today. What info (besides pics) are you looking for?
I could be wrong, but it's my understanding that the optional coating was not intended to "match" the factory color of the receiver, but to simply be subdued compared to the shiny Titanium of the non-coated part.
As you can see in my photos, carriercomp's knob is not as dark as the factory part (which matches the factory color of the receiver and bolt carrier).
Does this matter to me.......nope, not at all. The checkering of the carriercomp part gives more reliable purchase than the simple grooves of the standard part. The cylindrical shape of the carriercomp part also makes it feel more natural and, dare I say, comfortable to use.
All in all, I'm very satisfied with the design and execution of the carriercomp knob.
Grizz