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I was looking at possibly putting in an order for a Fail Zero nickel boron BCG but my question is would I have to do any headspacing procedures prior to firing it in my AR15? I read a few things online where people have said the bigger manufacturers of BCG already have the proper headspacing but just want to make sure. I have a noveske afghan that I would use it with and just use the noveske BCG as a back up. Anyone with any experience with a Fail Zero or any nickel boron BCGs let me know how they compare to mil spec BCGs and your pros and cons. Thanks