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Posted on 02/27/2013 1:15:41 PM PST by Nachum
SLA and FDM. Does not fail from firing stresses. 600+ rounds (.223).
(Excerpt) Read more at patdollard.com ...
Vid at link
If they could somehow put metal inserts into the printing, would that strengthen it up?
Yes, and it is not that difficult. But is that necessary? By the pen of the bureaucrat, the controlled part is not a barrel - which is a rocket science to manufacture - but a mere support component that doesn't seem to take too much of a stress and can be machined out of a piece of metal with many household tools, not even mentioning a cheap milling machine. A larger machine will only buy you more parts per hour. Printing those parts on a 3D printer is not any different from milling them out of a steel or aluminum plate. Perhaps printing is easier if you have a printer, and it's definitely easier to distribute the CAM files because all 3D printers take the same format.
Ya just know these guys are rapidly evolving this tech by working 24/7. It’s benefits are enormous and worth billions!