So things are happening, but slowly and often bottlenecked by tooling constraints.
I'm starting to sound like a broken record, but things get kinda wonky when there's only one endmill, and it has broken flutes, so you're grinding off a quarter inch of it, and then re-grinding the flutes by hand with no guides, etc.
This will appear to be pretty chaotic as far as pistons go, but I have 4" of action travel, and 7.5" to work with. I need room for the piston and the action spring, room for them to move, for the spring to compress. On top of that, I have to feed this piston system with gas, and that gas has to come from somewhere right after the forcing cone, and before the chamber. Seeing as I don't have enough room to swing a fucking cat, I have to make the room.
As you all know, the cylinder will house the piston. I have to drill a hole after the forcing cone that will go into a gas tube, a tube that's in the center of the whole cylinder and piston, and that gas tube will vent near the muzzle, right in front of the piston. Technically, in a small chamber located in the piston, just so that there's room for the gas to vent out of the gas tube.
The piston is pushed back, and it rides inside the piston cylinder, on the gas tube, compressing the action spring and moving the action bars to the rear. At the 2 to 3" point, the cylinder has cuts so that the action bars can actually contact the piston, and that's where the gas exits the system; inertia should do it's thing from that point on. The rest is pretty straightforward.
>issue number 1
In this picture, the hole leading to the chamber interferes with the action spring. I'll have to change that a bit, and put the gas hole in the gas tube at the rear, and connect that rear hole with another gas tube that will circumvent the action bars from the outside, and go to the barrel right past the forcing cone.
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