I purchased new Bushmaster O.R.C. on Tuesday night. It had just arrived at my local dealer earlier that day. I've purchased from this dealer before and, he's got a great reputation. When I got it home, I was familiarizing myself with the rifle and cleaning-up some of the excess oil applied when shipping. Usually, when I do a pre-shoot clean up and inspection of a new firearm, the oil is clear to honey colored and the chamber and receiver clean. When I was inspecting the upper receiver, the oil was greenish with plenty of black residue. There was even residue at the muzzle. It really looked as if it had been fired! Is this normal? I'm wondering if the "black" is due to the fact that it's a black rifle. Any info or opinions would be appreciated! P.S. I can't wait to hit the range!