Originally Posted by NorCalDustin
DO NOT take apart your bolt... Seriously, 9 out of 10 of them that I've seen having function problems have due to people taking the bolt apart and messing up the rails when putting the collar back on.
Just pull the bolt back and clean it that way. No need to take it apart.
Now, to remove the entire BCG from the upper, simply pull backwards on it kind of hard.
I learned the hard way on guns. Now I do not take a part anything I am not 120% confident that I can put it back.