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Semi Automatic QEV Paintball 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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Semi Automatic QEV Paintball Gun

Unread postAuthor: Lockednloaded » Mon Feb 21, 2011 9:51 pm

Still kind of a work in progress, but I thought I'd showcase it in its final stages

Specs and Features
o 3/4" QEV piloted by 1/4" Slide Valve
o 3/4" CPVC Paintball Barrel
o "Polymorph" custom molded parts
o Tee-mag with "Polymorph" non-adjustable detent
o 0-700psi CO2 regulator
o male 1/4" QD with check valve
o Epoxy based paint to avoid chipping/wearing away

Specs and Features to come (very soon)
o Spring loaded trigger return (I've got this worked out with rubber bands, its just ghetto looking)
o Real Paintball Hopper
o Some sort of sight
o "Polymorph" foregrip

Some Photos:
Sorry for the awful quality, once I get some upgrades worked out I'll take some better ones

Image

Image

Image
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Unread postAuthor: AnotherSnappedLine » Mon Feb 21, 2011 10:03 pm

Good work; how well does the hopper seal? Any leaks?
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Unread postAuthor: AnotherSnappedLine » Mon Feb 21, 2011 10:06 pm

WHere did you get the QEV?
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Unread postAuthor: Lockednloaded » Mon Feb 21, 2011 10:16 pm

I don't have the hopper yet, so I don't know. I've only tested with a tube mag, and it works fine. I got the QEV from McMaster-Carr.
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Unread postAuthor: POLAND_SPUD » Mon Feb 21, 2011 10:37 pm

Dude that's fu***** awesome

try to find a spring that you can put between the grip and the slide of slide valve (uhmm around it acctually)

ohh if you find a cheap air cylinder consider mounting it under the barrel... get a tube that fits inside the barrel and cut a small slit in the barrel... and voila you've got a semi firing from a closed bolt
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Unread postAuthor: PVC Arsenal 17 » Mon Feb 21, 2011 11:11 pm

Love the grip, love the slide valve. Awesome work.
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Unread postAuthor: Lockednloaded » Mon Feb 21, 2011 11:59 pm

Thanks POLAND the spring around the slide valve may be hard to implement for the polymorph would have to be reheated to access the slide valve, but I might just try the closed bolt if this doesn't feed well at high ROF, but for now the detent feeds well and may just work out as a hop up

@PVC_arsenal, I'm glad you like it, Im trying to show that slide valves don't have to be the most uncomfortable DCVs, they just need a little work.

If you like the current look, I'm hoping the upgrades will blow your minds!
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Unread postAuthor: POLAND_SPUD » Tue Feb 22, 2011 12:25 am

Thanks POLAND the spring around the slide valve may be hard to implement
not really, you don't have to disassemble anything to put a spring around it.... uhmm you can wrap the spring around

uhmm given my limited vocabulary it's kind of hard to explain, but I am sure others will tell you how to do this
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Unread postAuthor: Crna Legija » Tue Feb 22, 2011 1:53 am

POLAND_SPUD wrote:Dude that's fu***** awesome

try to find a spring that you can put between the grip and the slide of slide valve (uhmm around it acctually)

ohh if you find a cheap air cylinder consider mounting it under the barrel... get a tube that fits inside the barrel and cut a small slit in the barrel... and voila you've got a semi firing from a closed bolt



dam i am working on that exact same thing.

anyway that look every nice. hows the power?
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Unread postAuthor: Gaderelguitarist » Tue Feb 22, 2011 1:32 pm

uhmm you can wrap the spring around


What he means is get a spring with an inner diameter that matches the outer diameter of the pipe behind the slide valve. Put it in between the slide valve and your grip.

Did you paint the polymorph or just dye it black with pigments mixed in?

If this were mine, I would make a piece to go from the back of the QEV to the top of the grip that folds down over the sides. It would give the back of the gun a more solid look.
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Unread postAuthor: Lockednloaded » Tue Feb 22, 2011 1:48 pm

POLAND, I get wht you're saying, there's just no room for a spring

I can't wait to see your project -_-

EDIT just saw your post, the polymorph is painted, an extra parr could be added, but I would have to repaint. Thanks for the suggestions though
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Unread postAuthor: warhead052 » Sat Mar 26, 2011 10:49 am

Should I use half inch ID pvc? Or 3/4 ID? I am just wondering because I am making my own paintball bolt action sniper rifle. Btw, nice job, looks excellent.
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Unread postAuthor: the unit » Sat Mar 26, 2011 12:00 pm

3/4 cpvc is a perfect fit for paintballs
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Unread postAuthor: warhead052 » Sat Mar 26, 2011 12:08 pm

Ok thanks! (Message too short...)
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Unread postAuthor: clemsonguy1125 » Sat Mar 26, 2011 3:13 pm

1/2 PVC SDR21 is the best in my opinion.
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