I know that I don't need to get the headspace checked, because headspace is the devil, mama said so.
I don't need to get anything gauged, because gauging is for those that don't believe in there (lack of) skill.
I'm just gonna slap all these random parts together and go out with my freedom seeds and scream 'MURICA at the top of my lungs and think that those guys on that forum are nuts, because the gun hasn't gone kaboom.
AR's are self headspacing.