Workin' on a coaxial sleeper build

[Moonbogg]

Looks like an average cannon until you see the inside. I used the chamber volume efficiently for valve design to maximize flow with no restriction; 1 5/8" port with radial chamber vents that exceed the port surface area. Like my last design, there is no pilot venting per shot. The barrel will easily unlock by twisting a quarter turn and you take it out (if you want) to load spuds or mini 2 1/4" diameter soda cans, or mini tennis balls.
Can use a ram rod with a plastic piston on the end to pump and pull through the barrel to exhaust and get fresh air to the chamber to reduce air pumping with the bike pump for each shot. This is my simplest, cleanest, lightest, most effective design yet. A solid 4X coaxial design. Weakest link is the chamber wall (1/8") and should blow around 2500psi. The threads are ridiculous and are basically indestructible, so the chamber walls will blow before anything else gives out, and expected max, closed chamber pressure is around 400-500 ish PSI, so that's good.