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Semi auto air rifle bb gun {UPDATE NOW WITH VIDEO}

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 auto air rifle bb gun {UPDATE NOW WITH VIDEO}

Unread postAuthor: LovableAirGuns » Mon Jul 25, 2011 7:08 am

Hey everyone

Lately iv been working on a semi auto air gun. At them moment i shoot bbs until i get some splat balls since splat ball are pretty dear and hard to find unless you look on eBay. The gun shoots about 10psi each shot and the 1st chamber is filled to 110psi. The first 10 shots are the good after that they weaker and weaker (pointing out the obvious).
Later on im hoping to crank up the pressure and use a soda stream bottle and fill it up with air and having a high pressure hose comming from my bag into my gun and also try and make stock that looks nice :D
let me know if im missing out some info :)

Specs:
1st chamber: fire extinguisher
2nd chamber: galvinised pipe
Qev: http://www.ebay.com.au/itm/G3-8-Pipe-Pn ... 459wt_1139
3 way valve: http://www.clippard.com/store/display_d ... sku=MJVO-3
Pressure: 110psi

Pictures:

3way valve and QEV
Image

3 way valve
Image

Gun
Image

Adjustable detent im working on :)
Image

End cap for magazine
Image

End cap and magazine
Image

Receiver and the yellow bb is the detent
Image

End cap on the magazine
Image

[youtube]http://www.youtube.com/watch?v=FKJ6yO4_xGc[/youtube]
hope you enjoy the video :)
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Last edited by LovableAirGuns on Sun Jul 31, 2011 5:50 am, edited 2 times in total.
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Unread postAuthor: Crna Legija » Mon Jul 25, 2011 7:28 am

nice, looks good, you should get a air cylinder and take advantage of the 3way.

your from aus right? how much was that mjvo-3? i would love one, i have a slide valve but they are gay.
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Unread postAuthor: LovableAirGuns » Mon Jul 25, 2011 7:33 am

the 3 way valve is $31 its a bit pricey but it works great but i didn't buy it because a friends bought it for me :)
And yes i do live in Aus
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Unread postAuthor: POLAND_SPUD » Mon Jul 25, 2011 7:34 am

get a air cylinder and take advantage of the 3way

POLAND_SPUD approves

consider putting the air reservoir in a back pack
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Unread postAuthor: LovableAirGuns » Mon Jul 25, 2011 7:48 am

i would use a air cylinder but im worried about it popping the paintballs (splat balls) since its got threads on the rod :/

consider putting the air reservoir in a back pack


Thats what im going to do when i get a hose to connect it :)

[/quote]
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Unread postAuthor: daniel0663 » Mon Jul 25, 2011 7:51 am

Nice build man, Got a estimate speed on those bb's?
also how much does that thing way...
Must be heavy. :tongue5:
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Unread postAuthor: LovableAirGuns » Mon Jul 25, 2011 7:56 am

Nice build man, Got a estimate speed on those bb's?
also how much does that thing way...
Must be heavy.


it is actually very light, lighter that i thought it would be and estimate on bbs i dont know but shooting 10m away from a fence it takes about half a second to reach the fence from 10m away :)
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Unread postAuthor: LovableAirGuns » Mon Jul 25, 2011 9:23 am

Sorry for the double post but with air cylinder wouldnt it pop the paintball since its going to push it really fast?
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Unread postAuthor: Gun Freak » Mon Jul 25, 2011 9:52 am

LovableAirGuns wrote:it is actually very light, lighter that i thought it would be and estimate on bbs i dont know but shooting 10m away from a fence it takes about half a second to reach the fence from 10m away :)

20 meters/second :lol:
Gun looks really nice... I want an mjvo-3 lol
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Unread postAuthor: Crna Legija » Tue Jul 26, 2011 1:15 am

LovableAirGuns wrote:Sorry for the double post but with air cylinder wouldnt it pop the paintball since its going to push it really fast?


If you smooth of all the edges, don't blast the trigger at full rps and get a pressure reducing fitting on the air cylinder (i have one input is 600 output 35psi) to stop the air cylinder crushing crap(at 600psi my shatters marbles no jams tho lol)

I think the could make it. or you could make cartridges(more like shields) for them out of like 1/2'' PVC.

can you ask your mate how/where he got it?
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Unread postAuthor: LovableAirGuns » Tue Jul 26, 2011 1:52 am

20 meters/second
Gun looks really nice... I want an mjvo-3 lol


Haha you should there GREAT!

If you smooth of all the edges, don't blast the trigger at full rps and get a pressure reducing fitting on the air cylinder (i have one input is 600 output 35psi) to stop the air cylinder crushing crap(at 600psi my shatters marbles no jams tho lol)

I think the could make it. or you could make cartridges(more like shields) for them out of like 1/2'' PVC.

can you ask your mate how/where he got it?


I might do that just smooth out all the edges and stuff but still wondering if u should shoot bbs or splat balls, splat balls are fun and not dangerous as much as bbs but bbs are easier to find, cheaper and more fun than paint balls so i might go with bbs using my gun since there more fun than paint balls :)

Im not entirely sure on what he did but i think he ordered it of the web site but we had to go pick it up since it would be cheaper but wouldn't much of a price change but we had to get some fittings from there so its worth the pick-up but the guy there was hell sus he kept asking what we where making it for and we said it was for some vacuum casting thing so yea.
but you can get it posted to your house i think.
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Unread postAuthor: Crna Legija » Tue Jul 26, 2011 3:39 am

LovableAirGuns wrote:Im not entirely sure on what he did but i think he ordered it of the web site but we had to go pick it up


where did he order?

LovableAirGuns wrote: but the guy there was hell sus he kept asking what we where making it for and we said it was for some vacuum casting thing so yea.


lol just say your making a pneumatic can crusher for school
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Unread postAuthor: LovableAirGuns » Tue Jul 26, 2011 4:21 am

My bad but i think you have to call :/
these people are located in Adelaide and here is the link: http://www.pneucube.com.au/index.html

lol just say your making a pneumatic can crusher for school

Im gona use that next time ;)
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Unread postAuthor: Crna Legija » Tue Jul 26, 2011 4:36 am

LovableAirGuns wrote:My bad but i think you have to call :/
these people are located in Adelaide and here is the link: http://www.pneucube.com.au/index.html


Thanks!!
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Unread postAuthor: jazzman56 » Tue Jul 26, 2011 4:46 am

Hey where can you get the galvanized steel pipe ???? I've looked everywhere and bunnings don't seem to have it. Maybe i'm looking in the wrong section, any ideas.
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