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Another First QEV Gun

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Another First QEV Gun

Unread postAuthor: Lionel » Fri Aug 27, 2010 4:10 pm

Just put together my first QEV gun today, been roaming around for a few months and waiting for the chance to built one up, think i'm hooked now.

11 inch Alloy 10mm OD barrel shrouded in 10 inch a steel 12mm OD tube

fired it at 50 PSI using an 6mm inner barrel and it put an ink cartridge through a double corrugated cardboard box, it'll go up to 200 PSI but I need a new chamber first.

its a 3/8" QEV piloted by a compression fitting ball valve (happens to also have 3/8" threads) and the shock pump is a generic one rated to 300 PSI that i've modified with a hose barb-1/8" adapter

First time doing this so be gentle :P
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Unread postAuthor: SpudFarm » Fri Aug 27, 2010 4:41 pm

Those builds are alot of fun. I still look around in my box for parts to build stuff like this once a while.
Try to shoot some BB's through it, should be a great plinker.

Clean build, Size isn't all :)
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Unread postAuthor: Gun Freak » Fri Aug 27, 2010 5:08 pm

Looks nice, I bet its fun getting so many shots off rapidly. I would presume that it doesn't take long to pump it up with that shocky. Fun little plinker :D Nice job.
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Unread postAuthor: Lionel » Fri Aug 27, 2010 5:14 pm

SpudFarm wrote:Those builds are alot of fun. I still look around in my box for parts to build stuff like this once a while.
Try to shoot some BB's through it, should be a great plinker.

Clean build, Size isn't all :)


Thanks! :) Just need to get a new chamber put together, I won't say what happened to the last at 200 PSI (I jumped a little) but that little mistake won't be happening again anytime too soon. :?

Gun Freak wrote:Looks nice, I bet its fun getting so many shots off rapidly. I would presume that it doesn't take long to pump it up with that shocky. Fun little plinker :D Nice job.


Takes about 10 pumps if that to get to 50 PSI, i'm thinking i'll use a spent 16g CO2 cartridge with a elbow and reducing bush but ultimately I want semi auto and that includes chambering a round :D
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Unread postAuthor: Gun Freak » Fri Aug 27, 2010 5:21 pm

Well you could just add a simple tee mag with a detent and then add a air source and bam semi auto. Make the chamber smaller. A CO2 cart should be good.
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Unread postAuthor: Lockednloaded » Fri Aug 27, 2010 7:24 pm

for semi auto, I would mod the QEV to fill chamber side and get a blowgun for a pilot. that in conjunction with an airsoft hop-up and constant air feed will give you semi auto
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