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Pump Action Reloaded

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 Reloaded

Unread postAuthor: farcticox1 » Thu Jun 20, 2013 11:51 am

So here is my much awaited (by me) pump action, firing 1/4" steel BB's. Magazine holds 20, slide mechanism moves about 1/2" and as an added bonus if the slide is held back you get full auto :lol:

Everything hand made, mostly aluminum, slide is stainless fabricated out of 8 pieces (I made it too short first attempt)

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It started as a pistol but was too heavy for one handed use, so it got modified.

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Adjustable 'Layzor'

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Return spring hidden inside the handle.

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Here's whats inside the slide

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Last edited by farcticox1 on Sun Jul 07, 2013 4:57 pm, edited 2 times in total.

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Unread postAuthor: wyz2285 » Thu Jun 20, 2013 12:38 pm

Wow that looks nice :)
So according to your drawing every shot takes 3 BBs?
If the magazine has a 90º bend instead of sticking off it would look so much better, or make it round like a drum mag.
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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: farcticox1 » Thu Jun 20, 2013 12:46 pm

No, it only fires 1, I think the other 2 are pushed back down by the pressure.
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Unread postAuthor: wyz2285 » Thu Jun 20, 2013 12:50 pm

farcticox1 wrote:No, it only fires 1, I think the other 2 are pushed back down by the pressure.

Interesting, the other 2 should be supposedly "sucked up" duo to venturi effect. However I'm glad it works :)
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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: farcticox1 » Thu Jun 20, 2013 1:10 pm

I think a slight leakage through the slide keeps a positive pressure inside, the only oddity is when the plunger enters the slide and jams it open, you know it's the last 3 three shots, they have to be fired as auto with the slide held backwards.
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Unread postAuthor: wyz2285 » Thu Jun 20, 2013 1:26 pm

doesn't sounds like a big problem :) I bet it's a lot fun
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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: hawktalk » Thu Jun 20, 2013 2:40 pm

any chance of a shooting video?
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Unread postAuthor: farcticox1 » Thu Jun 20, 2013 2:46 pm

Yes, I will do one at the weekend and get the Layzor dialed in.
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Unread postAuthor: tigerblues28 » Thu Jun 20, 2013 3:27 pm

What kinda power? Also what's your valve for firing. Is it a blow gun or something? Sorry if I didn't catch it in previous posts.
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Unread postAuthor: farcticox1 » Thu Jun 20, 2013 3:52 pm

Yes it's my favorite pressure washer trigger.
I'm guessing power similar to my long barrel version, will go through the bottom of a pop can and dent the top, no exit. Straight through side on. This is with 100psi, the trigger is rated for 5000psi so there is room for greater damage.
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Unread postAuthor: tigerblues28 » Thu Jun 20, 2013 4:56 pm

Oh okay cool. I may just have to make an airsoft sniper hmm? How much did your pressure washer cost?

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Unread postAuthor: farcticox1 » Fri Jun 21, 2013 7:29 am

The trigger was my favorite price, free. Got it out of the scrap bin at work, the plastic cover was gone and it had a fitting snapped off in it, but I have a good stud extractor that got it out.

This is what it should look like


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http://www.globalindustrial.ca/p/outdoo ... -spray-gun

They are not that expensive, and you can get them with a barrel
:lol: ready made spud gun :shock:
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Unread postAuthor: farcticox1 » Fri Jun 21, 2013 8:46 am

Might make some cosmetic additions and folding stock, something like this.

Image
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Unread postAuthor: django » Sat Jun 22, 2013 6:24 am

YES!!!! you got the Pump Action to work, im hopeless and haven't even had time to start mine :roll: .

Well done mate

Indeed modify it as pictured in the above post
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Unread postAuthor: farcticox1 » Sat Jun 22, 2013 7:58 am

So it seems wyz2285 was correct, it is firing 2 shots at once, I will try and fix this, hopefully simply.
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