I sort of freestyled this gun, trying to figure chamber sizes and such. so I've built a modular testbed where I can change out chamber and barrel types.
Currently it's got a 1/2" copper barrel at 24" long. chamber chamber is currently 3/4", although I had other sizes and lenghts on it before. I also have a full 3/4" ball valve in-line to vary chamber size when shooting. I can use it for multiple shots with one fill for plinking, or high power by using the full chamber for one shot. it's sort of an ever evolving work in progress.
The firing valve is a full 1/2" ball valve toggled by a spring. the valve is held closed by resting against a leaf-spring like sear. only a little squeeze on the "trigger spring" is needed to release the simple mechanism. I cock the lever forward and reengage the mechanism with the aid of an additonal little knob attatched to the lever.
I've also integrated a shock pump so it's very mobile. for major shooting, I use a little 12 volt compressor that quickly fills the gun up to 250 PSI.
Normally used around 150 psi or so, highest I've brought it to to date is 300. shoots great and accuracy is improving as I dial it in. I use marbles and custom pellets (more like saboted lead sinkers) that are a bit more accurate.
Any questions or comments, feel free to post them.
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