I haven't given up on my silencer projects. It just takes a long time for me to do anything. I finished (almost) my model of the QA/QD muzzle brake that I turned out of delrin.
The shoulder is 60* with a two start ACME stub thread (lead 8 pitch 4). Currently the holes are both 1/2 inch but I'm planning on the first hole to actually be 5/8 inch.
I did this out of delrin first just to make sure I had the tools needed to get the job done. So now the next step is to do a set of check gauges for the threads.
And so the silencer projects move forward. . .
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