TexasCHLforum.com

The orange reddish color on the bottom of the bolt in the receiver is most likely oil. The oil on mine will collect dust and turn color or maybe it is a little light rust but you can easily remove that.

The different coloration on the barrel is likely because it is not a smooth surface. It looks like a bunch of shallow grooves on the outer surface of the barrel, or at least that is how mine is designed most likely for heat dissipation.

Looks fine to me but i usually prefer to see them in person before i buy. I would follow through with it.