Hammer valve/ QEV combo is the way to go. The hammer and spring will allow you to adjust the power versus number of shots from a given tank depending on volume and pressure. Plus...The "clank" of a hammer gives it something extra. ;) A counter balanced hammervalve is more complicated to build ...alt...

Could it be because you can 't compess a liquid?Too much liquid in the system preventing parts from moving perhaps?

I just think shooting cowboys is wrong ..


but seriously..looks like a lot of fun!!

Nice main valve

Basically a coax with the reservoir pointed in the opposite direction...I like it!

It's just the toy / baby-version of one I made a decade ago.. Full metal.. capable of 22 bar..shot there at 12 bar .Can 't .compare that to handpumped..
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I simplify by complicating stuff minigun grip ..now it's balanced. I can carry it like a suitcase. I just need to get two replacement fittings to tidy up the pilot side. Things could be a bit cleaner..

It's perfectly doable as it is a low pressure build. And it's not that big. I'm reconcidering the position of the blowgun..it would be better on top and a bit to the rear for better balance..

I imagine so..that's why I pump it shotgun style. Pump from the hip, launch from the hip.. Added foam to the shoulder...I mean hipstock..

I used sections of pipe, rather than sheet. Had some left óver anyway. In the meantime I made a protective wraparound mount for the pump..

Indeed :D :D I trew something together..flattened pvc in the oven and wrapped it around..the bolt also holds the original bracket on the pump in place. This is the pretty side :lol:(edit) I also removed the pressure gauge as it's not possible to exceed the rating by pumping it manually..at least..I ...

That's because I hacked up the baseplate to make it fit. I still need to make some decent brackets for it that double as a barrel support.

Onboard pump...

ITWOST I learned there is no such thing as potato cannons on the internet these days according to this "well informed" Vice reporter..https://www.google.com/url?sa=i&source=web&cd=&ved=2ahUKEwjW7Jity7nhAhVFblAKHc1mBcEQzPwBegQIARAC&url=https%3A%2F%2Fwww.vice.com%2Fen_nz%2Farticle%2F43y5qn%2Fhow-potat...

Wow. K.I.S.S. went out the window real fast. secondary projectile.. I can't wait to see what you'll come up with.