Hi to everyone.I'm not new to ar's by any means.Nor do I know everything about them.I have several ar15's and built all of them.As far as 308 ar's,I've owned a DPMS 16",SR25 LWM,built an Armalite AR10 from a stripped lower.My most recent completed project started with a Larue Tactical OBR 7.62 lower I scored on arfcom.I bought two Armalite upper receivers and did the machining to them myself to make them work on the LT lower.My work-in-progress is a new AR10A stripped lower.