Seems like both a misdesign AND a manufacturing issue.
It's awesome that they used rails to attach the feed tube thingy. Picatinny would have been nicer, but whatevs.
They should have attached the feed neck via the exact same mechanism (and that's where the extra beefy Picatinny would be useful). The part could be threaded again, although really the whole idea of (threaded-)feednecks-as-structural-component just needs to go away. Maybe someone will figure it out in the next 30 years. Or not.
See also: SA-17, Empire Trracer, TM-7, TM-15, etc.
Bad design right in that area, and worse execution.
Missteps will happen; it's the response that counts. So now we get to see how PTP responds. Again. As if we needed another example.
"Accuracy by aiming."
Definitely not on the A-Team.