Began rusting but functional - TRYBE Defense Mil-Spec AR-15 .223/5.56/.300 AAC Complete Bolt Carrier Group (BCG) BCG

Bought this for a 300blk build. I took the bolt out of the bag and put it in my upper, no oil, haven't fired it, and left my gun on my dresser for about a week. When i went to oil it before shooting it there was surface rust all over the carrier. It functioned well to fire about 10 rounds. After that combined with the clp oil it seemed like the rust might be coming off. I would have to question the nitride finish because my 3 other nitride bolts from Aero and PSA haven't rusted while sitting around waiting for my other build parts to show up.