Mini Keychain Coax (Updated with damage pics and video)

Miniature guns are novelty custom, unique, and sometime downright crude! Common construction materials often include pill bottles or pens. Show us your work!
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jook13
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Sat Jan 17, 2009 3:16 am

I had some spare brass tubes laying around my garage and decided to make something of some of em. Seeing as how penguns are all the rage and I have already built one, I was trying to think of something different. Smaller seemed to be a good contrast to my last project.


Here she is, the keychain coax. I think it goes without saying that I didn't build this for performance seeing as how the barrel is only about one inch long. I do think that it is a cool novelty and I also think that I have the coolest keychain on the planet.

I have test fired it at around 100 PSI so far and it works. It will shoot a small nail dart across the room no problem at this pressure. I will wait till tomorrow to test it at higher pressures (wanna be sure the epoxy is set up). If I can enter a soda can, I will be impressed and satisfied.



Here are a few pics....

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The business end :wink:
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Compared to my pengun...
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The nail darts are tiny...
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Not at all to scale, but I hope this is somewhat clear....
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The up(down?)grade:
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It entered AND exited a beer can! it only took 400 psi :wink:
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The nail darts stick into drywall about 1/4 inch at 400 psi
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DAMAGE video... Sorta. Me shooting a beer can at 400 psi
[youtube][/youtube]
Last edited by jook13 on Sun Jan 18, 2009 1:05 am, edited 1 time in total.
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jackssmirkingrevenge
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Sat Jan 17, 2009 3:28 am

great stuff :) nice to see the concept being driven to the edge :D
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Cosmic Muffin
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Sat Jan 17, 2009 5:38 am

WOW
haha
that thing is a beauty
your really getting into the these pen guns :wink:
and with great results
good work
2 thumbs up
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iemand
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Sat Jan 17, 2009 5:49 am

Nice, any videos? :P
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IA_Armourer
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Sat Jan 17, 2009 6:08 am

could you write instructions on how to make one because no getting it
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inonickname
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Sat Jan 17, 2009 6:26 am

IA_Armourer wrote:could you write instructions on how to make one because no getting it
Read through your posts before clicking submit :wink:

Props to JSR: http://www.spudfiles.com/forums/files/p ... to_101.jpg It's similar to that.

Awesome though, I'm still trying to get my pengun to work! Might have to bribe JSR into building me one and sneaking it through customs..
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ALIHISGREAT
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Sat Jan 17, 2009 8:45 am

That thing's tiny! more fool the person who tried to mug you!..... i can imagine it now:

Mugger - "give me your wallet!"
Jook - "wait just one minute!" *produces shock pump from pocket and pumps up keychain gun* :D
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inonickname
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Sat Jan 17, 2009 8:48 am

ALIHISGREAT wrote:That thing's tiny! more fool the person who tried to mug you!..... i can imagine it now:

Mugger - "give me your wallet!"
Jook - "wait just one minute!" *produces shock pump from pocket and pumps up keychain gun* :D
When I get my flipping gun working (sealing face is giving me issues) I want to build a scaled down version of the pump in in how to's, pocket sized!
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starman
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Sat Jan 17, 2009 9:02 am

Oh yeah that's really nice. Love the finished look epoxy ends. It's small but I still wouldn't want to be on the receiving end of those nail darts!

Great job Jook!!
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sputnick
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Sat Jan 17, 2009 9:24 am

sweet deal, although you could have gotten away with a larger barrel... for bb's and such... Altogether I like it though, It reminds me of one of JSR's preloaded cartridge ideas... only the piston was further down the rod, and sealed right against the opposite wall.

How is it in terms of air-tightness? as in, if you pumped it up the morning, went to work, left work, went to your car and got mugged... would it be ready :lol:
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starman
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Sat Jan 17, 2009 9:35 am

sputnick wrote:How is it in terms of air-tightness? as in, if you pumped it up the morning, went to work, left work, went to your car and got mugged... would it be ready :lol:
:shock: OUCH!! Good point. You definitely wouldn't want that thing going off in your pants pocket.
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Sticky_Tape
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Sat Jan 17, 2009 9:52 am

Wow, I need to make one now. What is the chamber pipe's dimentions? *walks off to bedroom* *walks back and says* Sputnick I always thought that satelite was called sputnik 4. EDIT: and oh yes holy c:b ratio batman!
Last edited by Sticky_Tape on Sat Jan 17, 2009 10:00 am, edited 1 time in total.
You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Gippeto
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Sat Jan 17, 2009 11:37 am

Very nice Jook. :) Plenty nasty with the nail darts.

Small bore, epoxy, miniscule pilot volume,...it's almost...well...predictable that Jack would be the first to reply.:wink:

Moth to a flame so to speak. :lol:
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littlebro05
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Sat Jan 17, 2009 3:16 pm

Niceeeee.... suddenly I really want to make a pen gun... maybe next year since finals year 12 this year need to focus on studying but all you need to do now is to build a mini shock pump and your ready to go XD
It's Nerf or Nothing.

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Sticky_Tape
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Sat Jan 17, 2009 3:32 pm

http://www.spudfiles.com/forums/viewtop ... tml#223028
Something I made which was easy as hell :wink:
You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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