I'm looking at your "drill and pin low-pro gas blocks in place" service. I have one of the DSG arms back Friday special uppers from a few years ago that was built by seekins. I'm wondering if you can pin the adjustable gas block on that upper. The barrel is melonited and it's possible that the adjustable has block is as well by looking at it.
If you can't, can you even dimple the barrel for the set screws?
I also would like the "Concentric thread check" done on the barrel for that same upper. Right now, I have removed the flash hider, gas block, and handguard. So it's just the flattop upper (without BCG and charging handle) attached to the stripped 10 inch barrel via the free float barrel nut. Do I need to remove the barrel from the upper? Or can you perform the service with it like this?
I will be installing an AAC 51T flash hider for the AAC 762SDN-6 I have pending approval.
Video of the uppers if anyone remembers them.