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Pump action shotgun

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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Pump action shotgun

Unread postAuthor: andremat » Wed Aug 06, 2008 2:39 pm

Hello everybody, that's my first post. I come from the french spudgun forum (so, sorry for my poor english) and I have already built some spudguns and pneumatics rifles including a semi auto BBs rifle which has been introduced few months ago on this forum.

Here is my last creation :


The M245 Pump action shotgun

Caracteristics :

Cannon: copper / gauge 12mm ; lenght 550mm
Chamber: Approximativley 25ml

Home made quick exhaust valve 3/4'
tubular magazine
pressure used : 12 bars
Air tank : 1 liter
Ammo : 12mm steel ball



Pictures


Image

Image


Inisde the wood :
Image


Image


Image


The rod links the sliding part to the valve which fills the chamber for each shot.
Image
Image
Movie:
http://www.dailymotion.com/swf/k4mPr5Di ... &related=1
(the magazine was empty for the last shots of this vid)

sorry for the quality.
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Last edited by andremat on Wed Aug 06, 2008 2:48 pm, edited 2 times in total.

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Unread postAuthor: n-strike » Wed Aug 06, 2008 2:41 pm

That looks pretty, eh...funky.
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What a waste of 300 spud bux.
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Unread postAuthor: brogdenlaxmiddie » Wed Aug 06, 2008 2:46 pm

Good Job! Your english is pretty good as well!
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Unread postAuthor: jrrdw » Wed Aug 06, 2008 2:55 pm

I haven't watched the video yet, but I will. Looks good so far. Your english is pretty good, I,m glad to see the French spudsite members sharing their cannons with us Spudfile members.

Welcome to Spudfiles.
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Unread postAuthor: iisthemuffin » Wed Aug 06, 2008 3:10 pm

Wow. I really like this! Its true to the name indeed. I watched the video and it operates just as a shotgun should.

Amazing work.
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Poop.
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Unread postAuthor: blind909 » Wed Aug 06, 2008 3:21 pm

That is F*cking Awsome. You should make a wooden frame to hold the pump, barrel, and mag, then paint it black, and you could make it look like a real shotgun!
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Unread postAuthor: Antonio » Wed Aug 06, 2008 3:30 pm

Looks nicely integrated maan! Awesome

After seeing the vid:

Damn its really impressive. It even looks pretty efficient. Do you have more figures? How does the loading port work?
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Last edited by Antonio on Wed Aug 06, 2008 3:33 pm, edited 1 time in total.
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Unread postAuthor: hi » Wed Aug 06, 2008 3:32 pm

thats very interesting. you load and fill with only 1 pump. i think you should refine the design and use co2, that way its portable.
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: jrrdw » Wed Aug 06, 2008 3:40 pm

Very nicely done! The video was good to watch. Here in America we call that a riot gun because of the pistol grip. Thanks for sharing your cannon.
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Unread postAuthor: andremat » Wed Aug 06, 2008 3:53 pm

Thanks for the commentaries.

To the several suggestions :

-Yes, I thought to put a wood piece to operate the system.
You mean like this one :
Image
I think it could really improve its style.
I'll think about it...

-For the loading system, here is more picture and vids to understand how it works :
Image
A spring pushes the balls on the left which go to the barrel with the inclined plane.
(the magazine is located on more on the left in normal use)

http://www.dailymotion.com/andremat/video/x6c9r3_vid013

A zoom on the valve which fills the chamber for every action on the pump system.
http://www.dailymotion.com/andremat/video/x6c9sh_vid039


For the grip, I was inspired by the SPAS-12 :
Image
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Unread postAuthor: SpudFarm » Wed Aug 06, 2008 4:20 pm

great job!
4/5 because of the wood ;) if you have got some kind of plastic for the grip it would have got top score
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Unread postAuthor: trollhameran » Wed Aug 06, 2008 4:22 pm

Nice gun, im almost finished on my prototype shotgun, with pump action bottom ejection system, just need to work out how to make the mag work.
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Unread postAuthor: -X3- » Wed Aug 06, 2008 4:46 pm

Héhé, beau travail !
Tu vas avoir du succès sur Spudfile !

hehe, good job!
You'll have success on Spudfiles now!
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Unread postAuthor: jackssmirkingrevenge » Thu Aug 07, 2008 1:05 am

Very impressive, especially the way you combined the ammunition reloading motion with chamber filling. Shame that it (understandably) seems a little low on power, given the construction I think you can afford to up the pressure though, it could proabably take unregulated CO<sub>2</sub> :D
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Unread postAuthor: Necrosis » Thu Aug 07, 2008 12:14 pm

I like how simplistic everything works...

Really.. a ballbalve on a stick would never have come to my mind...
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