I haven't made the AR plunge yet but have been doing research, it seems most guys on here say that if you have a higher end AR such as Colt or Daniels Defense that your gun will be more "reliable" as far as if it isn't kept quite as clean it will still operate flawlessly, as opposed to your bargain rifles having more problems with failures due to being dirty. Now forgive me for my inexperience and possibly a dumb question here, but what is it about the higher end rifles that make them better than the cheaper ones, are the tolerances different to allow for more dirty operation? I thought all ARs were supposed to be built to the same specs. Is it just that the higher end rifles have nice smooth poished surfaces on all the parts therefore making them higher quality and less prone to have crap stick to them? As I said, probably dumb questions, just wondering what makes them so much more reliable.