SpudFiles

This is one of my first pneumatic cannons I've made, I tried to build on a budget and ended up spending a reasonable amount of twenty-two dollars. The stock is made fully out of 3/4 in. sch 40 PVC pipe and fittings with a pressure gauge and threaded valve stem.The firing system is a rainbird cp-100 1 in. modded sprinkler valve that is pressure rated for 120 psi.This pneumatic cannon has two detectable barrels,one with a .40 caliber barrel sleeved in a 1/2 in. PVC pipe with a breach loading system the other is a regular 3/4 inch barrel that's about 4 feet long.some of the ammo i use is .40 blowgun dart,triple a batteries,nails,and homemade scatter shots either filled with airsoft bbs or 5 marbles.


Fully assembled air cannon

Modded sprinkler valve

breach loading system locked

breach opened

stock/air chamber

Some damage shots!!
This was shot with a penny slug about twice.

shot a dart from about 5 feet at a penny taped to half inch plywood.

Pepsi can filled with water inside a soup can inside a tomato sauce can that was shot with a metal marble.

Nice - apart from the fact that the pressure gauge should ideally have been threaded in at a joint. And the fact that it's a 400 psi gauge is optimistic too...

However, apart from that, it looks good. Are you left handed by any chance?

picked it up at a swap meet for 50 cents.

Na im right handed. I hold the blowgun on the stock while i support it with my left hand which i place next to the stem valve,it`s actually really comfortable.

Okay. I just saw a left handed breech handle, so I thought I'd ask.

Fair enough on the gauge thing - just don't get optimistic...

Nice and clean, great work! Next time try tap the gauge in on a double layer of pvc (such as a joint).

i have a nut inside the pipe that's screwed on to the gauge and it hasn't leaked so far but next time ill try to go for a joint piece.

Fair enough on the gauge thing - just don't get optimistic...

I know plus i wouldn't even be able to get up that high or the diaphragm of the sprinkler valve would rupture and there goes my 15 dollars.

Very nice! Clean build.
Does the breech leak some air on firing?

Very Nice ... Good clean build and nice breech load system, though you should cut out some of that pilot volume.

Very nice! Clean build.
Does the breech leak some air on firing?

no,I added an o-ring so that it wouldn't.

It is amazing what a blow gun dart can do at 120psi huh. I used a stun dart at 200psi before and it went through the milk jug and the my fence.

It is amazing what a blow gun dart can do at 120psi huh. I used a stun dart at 200psi before and it went through the milk jug and the my fence. Shocked

ya, but there useless after wards,i got 400 for 20 dollars what about you?

Yeah I cant remember how much they were. I like to shoot mine at drywall at really low pressure because it slides easily in an out. (thats what she likes. sorry couldnt resist)

Yeah I cant remember how much they were. I like to shoot mine at drywall at really low pressure because it slides easily in an out. (thats what she likes. sorry couldnt resist)

lol i almost didn't get that, I guess that's what happens if you haven't slept in 2 days.

This is a neat build tape! As an upgrade, you could consider going to a quick connect instead of the schrader. Also, this would nicely operate with a reg'd CO2 setup...make it much more portable.

ya, my uncles giving me a air tank that he uses to feel up his jeep tires after four wheeling. I don't know if ill use it for this gun though.