The chamber was made from Stainless and Nylon, the barrel is copper.
It has been tested to 4x (max i want to go with it, plus the gauge died!)
Chamber volume 700ml
Barrel i.d. 23mm, volume 560ml
Ignition is from a simply made "spark plug" and a bbq piezo.
I use a syringe to inject Butane through the ball valve, bike tube valve to pump in the air.
Hope you guys likey I do! (hope the pics work also)
The first picture is the projectiles. Just added damage pics, these were only at 1x mix, clean through, note the size of the holes!!!

P.s. I'm trying to get the pics bigger.





