ARC failure to eject (Update)

[LaMan]

It's somewhat common in the Grendel world that new bolts with new extractors will need the extractor modified to work correctly.  What bolt and extractor are you working with LaMan?
Also if the extractor has a rubber doughnut on the spring end, I've been told taking it off is beneficial.
Snipping a coil or two off the ejector spring may help out.
Best of luck!

The BCG is a Psa grendel bolt head, purchased so I could get the gun up and running while waiting on a Monster bolt.  
The extractor does have the o-ring which I will remove and I'll research on how to modify the extractor.  I also think I'm headed towards an adjustable gas block, I like the idea of being able to fine tune the gas system.

Anyone have a  recommendation for a good adjustable gas block?