How to use ECM to rifle a barrel - DIY barrel rifling - Project ButWhatAbout
Because my accounts and such seem to keep getting taken down - I'll update contact info using headers. Disregard contact info in the comments, as it may be bad. Link should all be good - leave a comment or ping me if a link to files isn't working.
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In this video, I touch on all the components of my rifling setup. Between this video (the most important part of the tutorial), the tech writeup (still a work in progress), and a later video where I'll show the process in action, other folks (it could be you!) can replicate my results.