this post was submitted on 03 Oct 2025
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Trying to think of a simpler mechanism than rotating bolt lugs. The lugs on a typical assembly could be made from a steel part with a rim on one side and filed down using a guide and then drilled through the middle for the firing pin. The main issue I think is the complexity of the bolt internals. It may be possible to FDM some of the internals that don't take the brunt of the stress (maybe in a CF polymer) though again it may just explode.
If not using direct impingement the bolt can be simpler however it would still take many drill guides. The extractor and the breech face lock itself seem difficult to make unless they are changed.
I suppose if a barrel with taper could be successfully made with ECM then the breech face could be as well with the same principles? Maybe with 6 wires just inserted into the end so that it creates the pieces to lock into. I definitely need to do lots of experimentation so see if all of these ideas are possible.