I finally got my my specwar brake mounted after waiting a month for the tango down blocks to get back in stock, which was very easy btw. After cleaning up from the range yesterday I noticed that there is a light ring forming around the front of the gas block where the barrel finish is rubbing off. I only use frog lube to clean so I know if can't be from a harsh chemical. I'm disappointed to say the least I put a claim into FN this afternoon on their warranty claim website for my rifle. I really don't want to send the whole rifle in so maybe they will determine that they can swap out the barrel assembly. Heres a pic and I will keep everyone posted. Just really bummed right now because I love this rifle and the way it shoots.