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QEV 6mm Sniper

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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QEV 6mm Sniper

Unread postAuthor: 1nxtmonster » Wed Nov 20, 2013 4:19 pm

**EDIT** I have assembled the rifle's internals and given it a bolt action system.

P1030595.JPG


Planning on building an airsoft sniper using this qev/ pilot combo:

http://www.amazon.com/gp/product/B00GMT ... AZDOWP300U

http://www.amazon.com/gp/product/B00GMT ... AZDOWP300U

And I noticed that they were both PT. I live in america where we have NPT threads, is there an easy way to switch from one to another (e.g. some form of adapter)?
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Last edited by 1nxtmonster on Wed Jan 01, 2014 10:04 am, edited 1 time in total.

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Re: QEV 6mm Sniper

Unread postAuthor: Ragnarok » Wed Nov 20, 2013 4:32 pm

Assuming it's not just a typo, you're probably be better off looking around for something in NPT - 1/4" QEVs are sold in a thousand and one different places, but adaptors are just going to add more work, cost, bulk and joins (increasing the risk of a leak).
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Does that thing kinda look like a big cat to you?
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Re: QEV 6mm Sniper

Unread postAuthor: 1nxtmonster » Wed Nov 20, 2013 4:33 pm

Thanks. I didn't get a npt qev because I can't find a npt slide valve to pilot it. Any ideas?
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Re: QEV 6mm Sniper

Unread postAuthor: 1nxtmonster » Wed Nov 20, 2013 4:44 pm

Nevermind, found one.
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Re: QEV 6mm Sniper

Unread postAuthor: 1nxtmonster » Fri Dec 06, 2013 4:57 pm

Well, two weeks later and most of my parts have arrived. 1/4 inch QEV and slide valve, .25 gram bb's, rifle scope and rails, etc. Just waiting for my 65-round magazine to come. Some pictures of the internals while drying:

Screen Shot 2013-12-06 at 4.53.30 PM.png


Some test shots at 80 PSI and it will send a bb through 3 layers of cardboard at close range. Don't have a chronograph, but I'm assuming above 400 FPS? An idea I had was to make a board with marks for each inch, and record the bb flying with my 240 frames per second camera.
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Re: QEV 6mm Sniper

Unread postAuthor: advancedspuds » Fri Dec 06, 2013 11:00 pm

It's looking good!
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Re: QEV 6mm Sniper

Unread postAuthor: jackssmirkingrevenge » Sat Dec 07, 2013 8:54 am

I see you've gone for the commercially available breech, interesting!

An idea I had was to make a board with marks for each inch, and record the bb flying with my 240 frames per second camera.


240 fps is not really enough for meaningful data.
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Re: QEV 6mm Sniper

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Re: QEV 6mm Sniper

Unread postAuthor: 1nxtmonster » Sat Dec 07, 2013 9:30 am

Yep, I've gone for the commercial breech. I figure that the more off the shelf, standardized parts I used, the easier it will be to build and repair. It was pretty interesting to attach to the pipe nipple; I had to solder a brass pipe to the inside of the iron nipple, then "crown" the other end to fit it over the breech. And of course, it wouldn't be complete without a good lather of epoxy :)
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Re: QEV 6mm Sniper

Unread postAuthor: jackssmirkingrevenge » Sun Dec 08, 2013 12:29 pm

1nxtmonster wrote:And of course, it wouldn't be complete without a good lather of epoxy :)


:D As is written in the Holy Book, go forth and mix part A and part B!
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Re: QEV 6mm Sniper

Unread postAuthor: 1nxtmonster » Sun Dec 08, 2013 2:48 pm

Well, I've seen to have screwed up even the simplest tax of mixing epoxy. It is that two part putty stuff, It has been curing for 48 hours and it is still tacky. It should have been cured in 24 hours. Any thoughts?
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Re: QEV 6mm Sniper

Unread postAuthor: jackssmirkingrevenge » Sun Dec 08, 2013 3:34 pm

1) did you mix it well enough, and in the right proportion as recommended by the manufacturer?

2) Is it curing somewhere very cold?
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Re: QEV 6mm Sniper

Unread postAuthor: 1nxtmonster » Sun Dec 08, 2013 4:12 pm

1) Yes I mixed it well enough, and give or take the right proportions. Maybe a little to much of the grey stuff.

2) About 60 degrees farenheight.
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Re: QEV 6mm Sniper

Unread postAuthor: 1nxtmonster » Mon Dec 09, 2013 8:14 am

I figured I must have mixed the epoxy wrong, because 72 hours and it's still soft. So I peeled it all of, sanded up the surfaces, and mixed up a proper batch. It's now curing (again)
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Re: QEV 6mm Sniper

Unread postAuthor: jrrdw » Mon Dec 09, 2013 4:28 pm

Epoxy 101: Follow JSR's advice! :D

jackssmirkingrevenge wrote:1) did you mix it well enough, and in the right proportion as recommended by the manufacturer?

2) Is it curing somewhere very cold?
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Re: QEV 6mm Sniper

Unread postAuthor: sagthegreat » Mon Dec 09, 2013 5:26 pm

jrrdw wrote:Epoxy 101: Follow JSR's advice! :D

jackssmirkingrevenge wrote:1) did you mix it well enough, and in the right proportion as recommended by the manufacturer?

2) Is it curing somewhere very cold?




I thought epoxy cures faster in warm weather
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