Case sticks after firing

[Panshovevo]

Thanks Alwie. Much appreciated.
In case you didn’t see my thread, Ballistic Advantage told me an AR barrel couldn’t be treated after assembly of the barrel extension and drilling the gas port. I had emailed info@blacknitride.com and asked their opinion, but never got a response.

I’ll try a different contact. If all else fails, a local guy I did a bunch of consulting and testing for on a greaseless gun project is advertising a surface hardening service that supposedly works on barrels.