I did a back up sight zero and went to do a little cleaning before mounting the optic for zeroing and found that the anodizing was popping off along the top of the receiver where the bolt rides. The bolt was properly lubed with CLP before you accuse me of not lubing. I notified Colt and they were a little stand offish on the phone but eventually agreed that there was a problem. They paid for shipping and are saying it will be back to me by months end. The places where anodizing popped off are very ruff to the touch. I noticed on the end of the box it said (2013 Configuration). This concerns me, I'm worried that in the rush to fill orders after Newtown that quality control might have taken a back seat. I saw another guy in a YouTube video with a 2013 Colt that had no staking on the gas key. Plus the other day I saw a new Smith and Wesson M&P15 that was twisted severely meaning the end of the rifle stock sat 2" inches to the left of the grip. When I opened the M&P I noticed that the buffer tube was defective so I talked the guys at the LGS into sending it back to save a customer the headache.