Thank you all for your responses so far - rifle is a 5.56 mid-length DI system and was using PMC 55g ball. Never worked out of the box.
Entirely agree that a writeup and communication is key. Sent them a few paragraphs the first time around describing the problem and attempts at self-diagnosing (no loose gas key, off-centered gas block, tight bolt carrier fit, overly stiff buffer spring, etc). Came back without functional improvement.
If the error occurred after a few hundred rounds of use, I would entirely agree that no "divine intervention" would be warranted. However, as the rifle didn't get through a single magazine without continuous failure, I can't help but think the manufacturer has a higher degree of responsibility to provide remedy in this situation - quite clearly a case of manufacturing defect rather than user-induced failure. While I'm happy to assist and attempt to diagnose the problem, not sure I'm convinced that the consumer has a duty to do so when the gun is brand new and functioning so poorly.
Perhaps I'm being unreasonably obstinate while being 2k in the hole with a non-functioning gun, who knows. Thanks again for everyone's replies - truly appreciate the perspectives.
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