dbrown
Member
I'm fairly new in to ar-15s and do not know what or how head spacing an ar-15 goes.
A Mil-Spec bolt doesn't have a roll pin.The easiest way to do that is buy a jig to push the ejector in as you hammer out the roll pin which holds it in the bolt.
several years ago i shot an AR15 until it was worn out and no longer passed the FIELD gauge test.