Steve Culver explains the barrel fabrication process, and that of the tubes with names in the pattern here
https://docs.google.com/document/d/1jQPuv4yOXpTppdXkAiyGj6LC5bXDAYBCR1DME9lB0JM/edit

'Remington Arms'

[Linked Image from photos.smugmug.com]

The pattern all starts with how the lopin is stacked
https://docs.google.com/document/d/1xylidcizmxlYC66XHUDLpQFtU6gi9WyXSkTayKKWCXc/edit