Update on the current project and a little sneak peek: still lots to do (polishing valve seat, rebuilding piston to track more cocentric, some funny stuff with the barrel, a way to aim more better), but I managed to put a hole in my box spring with some supposedly "low power" testing and a plastic 1...

Since we're talking about rifling, have you seen how people are using "electrochemical machining" to rifle barrels from steel tubing? A very interesting way of doing it for those who are more at ease with 3D printing although I suspect it would be a challenge for rifle length barrels. mark.s has a ...

Thanks Jack!

That sucks, Jack, glad you have backups of at least some of it. Youtube have gone mental.

Sorry to hear that, man. Hopefully they reverse it?

Been a while since I was into PCPs, now I see things like selective fire PCPs shooting pellets instead of just 4.5mm steel BBs.https://www.youtube.com/watch?v=eBvs8Wvu0yg
Is this just iterations of the Huben full auto PCP? Hows the main mechanism work?