Bartholomew Roberts
Member
Here is a link to a nice technical explanation of every step of the AR gas system including a nice chart showing peak pressures in the system during firing. If you understand this, it will really help you understand how to troubleshoot an AR.
http://www.ar15.com/forums/topic.html?b=3&f=66&t=266108
http://www.ar15.com/forums/topic.html?b=3&f=66&t=266108