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QEV airsoft gun

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Is it cool?

no way!
1
4%
it's alright
5
22%
it's decent
7
30%
It's awesome!
10
43%
 
Total votes : 23
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QEV airsoft gun

Unread postAuthor: potatoflinger » Fri Nov 02, 2007 9:17 pm

This is my latest gun, it's a 1/4" QEV airsoft gun. The air chamber is made out of 3/4" black iron pipe, and the barrels are 5/16, and 1/4 brakeline. I made the gun so I would have something to shoot in the winter when it's too cold for pvc. Enough said, here are some pics.
Here's a video: http://www.youtube.com/watch?v=17Z9NNH65uI
Edit: I put up some damage pics, but I've really only taken pictures of tomatoes that I shot, so those are the only damage pics I have.

Edit: I just put up a new video:

[youtube]http://www.youtube.com/watch?v=sBo22iufr8o[/youtube]
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Attachments
VID00090_0001.jpg
The gun with both of the barrels
VID00088_0001.jpg
The QEV
VID00089_0001.jpg
The trigger/fill setup
VID00095_0001.jpg
Damage to a tomato
VID00082_0001.jpg
Damage to a tomato
Last edited by potatoflinger on Wed Nov 21, 2007 9:05 pm, edited 8 times in total.
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Unread postAuthor: mopherman » Fri Nov 02, 2007 9:19 pm

holy wow. i love the look of this gun. My only complaint is that your chamber is massive overkill. shorten the chamber or make the barrel a hell of a lot longer.
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Unread postAuthor: jon_89 » Fri Nov 02, 2007 9:21 pm

how much power? pretty nice though
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Unread postAuthor: potatoflinger » Fri Nov 02, 2007 9:22 pm

mopherman wrote:holy wow. i love the look of this gun. My only complaint is that your chamber is massive overkill. shorten the chamber or make the barrel a hell of a lot longer.

Well, I wanted the chamber long enough to make it feel like a real rifle, but I guess I could make the barrel a bit longer (or block off the stock of the gun).
Edit: The gun shoots around 500 fps (just a guess, haven't ggdt'd that just yet)
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Unread postAuthor: jon_89 » Fri Nov 02, 2007 9:25 pm

what pressure are you using?
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Unread postAuthor: potatoflinger » Fri Nov 02, 2007 9:26 pm

jon_89 wrote:what pressure are you using?

Usually 100 psi, because that's as high as my compressor can go, but I'm planning on putting a schrader valve on the gun soon so I can pump it up to 150 manually.
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Unread postAuthor: Zen/// » Fri Nov 02, 2007 9:32 pm

How accurate is it?
Any damage pics?
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Unread postAuthor: potatoflinger » Fri Nov 02, 2007 9:37 pm

Zen/// wrote:How accurate is it?
Any damage pics?

It's very accurate, and I'll upload some damage pics right now.
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Unread postAuthor: Ragnarok » Fri Nov 02, 2007 9:52 pm

That would be sweet if you could use more pressure. If you used a smaller chamber, a shock pump would be a viable option.
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Unread postAuthor: potatoflinger » Sat Nov 03, 2007 10:10 am

Ragnarok wrote:That would be sweet if you could use more pressure. If you used a smaller chamber, a shock pump would be a viable option.

Well, I don't want to take it any higher than 150 psi, since that's what the QEV is rated at.
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Unread postAuthor: Ragnarok » Sat Nov 03, 2007 10:31 am

But still, that would be a reasonable increase.

I'm a little lax about some ratings (but I usually stay within or close to most)- I use a 145 psi QEV at 320, and it holds fine. Quite a poor example to set, but those pressures are great fun.
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Unread postAuthor: potatoflinger » Sat Nov 03, 2007 1:48 pm

Well, there are some ratings that should be followed closely (pvc) and some that can be stretched a little (compressor blowguns).
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Unread postAuthor: Infernal Maveric » Sat Nov 03, 2007 1:51 pm

Looks like a realy nice BB gun you have there.

Just a quick question... Did you epoxy the breakeline into the threaded ftting for your barrel? Because I have my barrel attatched realy ghetto-y on my BB gun.
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Unread postAuthor: potatoflinger » Sat Nov 03, 2007 2:11 pm

Infernal Maveric wrote:Looks like a realy nice BB gun you have there.

Just a quick question... Did you epoxy the breakeline into the threaded ftting for your barrel? Because I have my barrel attatched realy ghetto-y on my BB gun.

The brakeline has a flared end, and it came with the fitting already on it, so I just attached the threaded fitting to the QEV.
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Unread postAuthor: Infernal Maveric » Sat Nov 03, 2007 2:18 pm

Oh okay, thanks.
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