4in Coax

[ferret_guy]

Here is my 4in Barrel sealing coax

Chamber size (nominal):4in x 65in
Barrel size (nominal):2in x 96in
Piston: 4in PVC rod
Sealing face: Old mouse pad
Main firing pressure: 30psi (due to space limatations)
Max firing pressure: ~120psi
Main ammo: Cast concrete slugs, Golfballs
Range at 30 psi: ~700-800 ft (Golfball)

Here is the completed cannon:


Here is a closeup of the back:


Here is the barrel with the front glued on:


Here are all the parts laid out:


The back has the fill valve, a safety pop off valve, and a 1in ball valve for venting. Currently fired at around 30psi due to space limitations.

[acs2997]

Very nice gun you got there! I'd love to see some damage videos

[PixelFelon]

We'll see about shooting it through some plywood later this week

[8tonsemi]

Awesome gun!!! Is the the piston serviceable I can't tell from the pictures?

[ferret_guy]

no it is not the cost of 4in threaded fitting make my sob quietly at night