Great nickel boron bcg - FailZero AR15 Bolt Carrier Group (BCG), No Hammer

I have a Fail Zero in my first AR build and it has been flawless. It definitely runs smooth and cleans much easier than a non Nickel Boron BCG. The only thing that happens is the bright silver finish does tarnish with use and does it faster if you use any of what Fail Zero calls "harsh" cleaners or solvents. As far as I can see, there is no loss of function from the tarnish, it just does not look as it did brand new. I shoot Three Gun and have never had a malfunction that I can attribute to the BCG