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How to: .50 cal semi-auto

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How to: .50 cal semi-auto

Unread postAuthor: wyz2285 » Wed Aug 29, 2012 5:31 pm

My mom told me to clean my room and I found out I have a couple of QEVs, 3-ways and cylinders all around, I thought I´d make something with them and my friend had just got me some 12mm steel BBs.
So I made a simple .50 cal semi-automatic using 1/2 inch stainless steel tube as the barrel. It works like the most basic 3-way+QEV+pneumatic cylinder semi-autos, the cylinder it´s connected to the chamber of the QEV and it´s used for reload.
Any question just ask POLAND_SPUD :D
Part 1:

Part 2:
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Last edited by jrrdw on Wed Oct 30, 2013 10:08 am, edited 1 time in total.
Reason: Fixed videos.
CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 30, 2012 1:53 am

Another great tutorial :D nice one, we have to show the world that with cheap parts from china and a bit of epoxy, they have nothing to fear from the zombie apocalypse ;)
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Unread postAuthor: wyz2285 » Thu Aug 30, 2012 3:11 am

Thanks Jack :) Well as soon as they can get a air source to power this thing :D also if 3-way valves aren´t that difficult to find on ebay :roll:
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: MrCrowley » Thu Aug 30, 2012 3:12 am

How much did the push lever 3-way and air ram cost you? Stuff like that is so expensive here.
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 30, 2012 3:25 am

MrCrowley wrote:Stuff like that is so expensive here.


Yeah, such a shame eBay doesn't work in NZ.
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Unread postAuthor: wyz2285 » Thu Aug 30, 2012 3:26 am

push lever 3-way and air ram cost you?

Really really want to know :lol: ? Less than 10 euro for both of them :lol:
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Lazyboy » Thu Aug 30, 2012 3:35 am

eBay works in New Zealand, I have been getting valves through eBay from Hong Kong They are cheap

Silver Tone 3/2 Way Pneumatic Component Valve Replacement U.S $8.77 $10.94 NZ delivered
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 30, 2012 3:41 am

Damn, forgot to hold up the sign.

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Last edited by jackssmirkingrevenge on Thu Aug 30, 2012 4:00 am, edited 1 time in total.
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Unread postAuthor: silentkill12345 » Thu Aug 30, 2012 3:48 am

nice :D may be my next one i'm not sure
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Unread postAuthor: POLAND_SPUD » Thu Aug 30, 2012 4:11 am

Awesome
ohh and you've got some cool valves
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Unread postAuthor: wyz2285 » Thu Aug 30, 2012 5:05 am

Damn, forgot to hold up the sign.

:lol: :lol: :lol:
ohh and you've got some cool valves

China it´s a wonderful place for spudders :D I have seem streets full of pneumatic/hydraulic stores :roll: also stores with large size pvc/nylon/abs bars...
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: CooperJS » Thu Aug 30, 2012 5:20 am

is that a single or double acting ram??
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Unread postAuthor: wyz2285 » Thu Aug 30, 2012 5:36 am

Double, but a single one would be easier to use.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: CooperJS » Thu Aug 30, 2012 5:38 am

why would a single be easier, are there any differences?
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Unread postAuthor: wyz2285 » Thu Aug 30, 2012 5:42 am

single acting rams has a spring to help it to return to it´s oringinal position while double actiong rams has another input port, you need some air to push ti back to it´s original position.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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