In continuation from the 4SAS4 testing, I sent out the plate marked #9 from the most recent test. We dropped that plate 2X per the standard with no provisions to mitigate the drop. Raw dog it if you will. The tear down revealed nothing superficial and it passed a torque test. There's a guy on reddit who X-rays suppressors, and we sent him #9.
He commented he couldn't see any cracking. EDIT: That's a scratch in his image screen.
I wonder how many of these Highcom still has as they are still being listed as "in stock" from TS: