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Pneumatic Pellet Rifle

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Pneumatic Pellet Rifle

Unread postAuthor: Alucard » Thu Jul 30, 2009 2:27 pm

Well, I have been a long time Air gun shooter, and I thought it would be fun to build a Pneumatic Air Rifle. Does anybody have any link's or information I could use to do this. I wish to make a HPA .177 cal rifle. I'm thinking around the 3000 psi range. Any advice? Sorry if their isnt much info here, but I'm walking into the blank on this.
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Unread postAuthor: jackssmirkingrevenge » Thu Jul 30, 2009 2:40 pm

That's quite a general specification, what sort of power/accuracy are you looking for, single or multi-shot, what will you be using to fill it, is compactness an issue... lots of things to consider.
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Unread postAuthor: Alucard » Thu Jul 30, 2009 3:15 pm

Well, I want as much accuracy and range as possible, generally the higher the power the better, and im looking at Compressed Air as the main power source, semi automatic would be great, but im willing to compromise at single shot. Also, compactness is not an issue. I will fill it with a scuba tank, I have the tank and compressor already.
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Unread postAuthor: POLAND_SPUD » Thu Jul 30, 2009 3:22 pm

so buy a PCA gun... (seriously that's one of the best thing that I could suggest)
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Unread postAuthor: Alucard » Thu Jul 30, 2009 3:34 pm

I actually want to build it though. I have the tools to make a rifled barrel, so im just wondering if anybody has a diagram or link to help me with everything else.
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Unread postAuthor: twizi » Thu Jul 30, 2009 3:37 pm

look on you tube u can get some ideas there
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Unread postAuthor: POLAND_SPUD » Thu Jul 30, 2009 3:44 pm

so I guess that your reasoning here is more less like this ->> 'I don't mind that it won't be as good as a commercial air gun... I am bored.. I have no life and I wanted to spend more money building it than cheapo commercial air guns cost... as I said eariler I have no life so I hope I will stop thinking about commiting a sucide while building it' :D

if it's not then you might consider buying one... there si no point in building somehting that won't perform as good as a store bought air rifle... if you want a chalenge then build a 3/8" air gun

ohh sorry for being such a dick... but you'll spend more time and $$$ building one yourself than it's worth it...

welcome to spudfiles.... you might think that this post is not helpful but in fact I am trying to help you now
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Last edited by POLAND_SPUD on Thu Jul 30, 2009 3:47 pm, edited 1 time in total.
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Unread postAuthor: Alucard » Thu Jul 30, 2009 3:47 pm

3/8"? Just out of curiousity, is their anyway to get one of these to accurately fire a 30-06 Bullet accurately out to 70 yards(The bullet, not the shell/gunpowder etc.), That would be hella fun compared to some weak .177 rifle lol.
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Unread postAuthor: POLAND_SPUD » Thu Jul 30, 2009 3:55 pm

with 1 cm barrel and 9.65mm ammo (ball bearings... but you could use lead shot for better energy retention)
you could get this
(if you are totally non-metric that's roughly 38ft*lbs and 565 ft/s.... notice that the chamber is quite small so you could get more easily)
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Unread postAuthor: Alucard » Thu Jul 30, 2009 4:15 pm

Allright, im looking at building something like this http://www.spudfiles.com/forums/25mm-sn ... 10615.html but having it shoot .177 cal pellets. I want to keep the budget under 100$ for this project. Does anybody think this is possible, I can upgrade to .22 pellets if it would be better.
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Unread postAuthor: Alucard » Thu Jul 30, 2009 4:38 pm

Allright, I thought about it alot, I want something like this http://www.spudfiles.com/forums/oak-gun ... 17674.html But im going to put a rifled barrel on it with a outer shroud, if anybody can give me a link on a tutorial to build it/etc. I would be glad. I want it to shoot .22 pellets.
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Unread postAuthor: POLAND_SPUD » Thu Jul 30, 2009 5:03 pm

I bought a fairly decent PCA air rifle for under 100$ (202PLN)

for me and most of the members it would be virtually impossible get the same accuracy, power and compactness/ergonomics/aesthetics etc. with a homemade gun as a commercial airgun has... not to mention that it would be far more expensive

I hope you are fully aware of it... I am not trying to discourage you from the hobby but large bore spudguns are generally much more impressive (realtively speaking... even 6mm barrel can be impressive)

let me put it straight:
if you are really looking for accuracy then buy an air rifle

if you are looking for power and a cool gun then build a spudgun with a 3/8" bore or larger

ok if you really want to build a .177 you'll need a regulator to use the scuba tank...
if you already have one and it can generate pressures in the range 250-800 psi then you just need a lenght of malleable iron pipe (10-15 cm of 1/2"should be enough for .177)

and a 1/4" or 3/8" QEV valve... QEV is essentially a commercialy made piston valve of course you can build one yourself but QEVs are so cheap these days that you might as well take the easier route and buy one

you'll also need a pilot valve and a tire valve for filling the gun
(a blowgun would be ok for 300-400 psi gun )

I hope this helps... but still what I wrote earlier stays valid...


there is a lot of info here just spend some time reading it.. that should make things for you easier in the long run
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Unread postAuthor: Alucard » Thu Jul 30, 2009 6:15 pm

POLAND_SPUD wrote:I bought a fairly decent PCA air rifle for under 100$ (202PLN)

for me and most of the members it would be virtually impossible get the same accuracy, power and compactness/ergonomics/aesthetics etc. with a homemade gun as a commercial airgun has... not to mention that it would be far more expensive

I hope you are fully aware of it... I am not trying to discourage you from the hobby but large bore spudguns are generally much more impressive (realtively speaking... even 6mm barrel can be impressive)

let me put it straight:
if you are really looking for accuracy then buy an air rifle

if you are looking for power and a cool gun then build a spudgun with a 3/8" bore or larger

ok if you really want to build a .177 you'll need a regulator to use the scuba tank...
if you already have one and it can generate pressures in the range 250-800 psi then you just need a lenght of malleable iron pipe (10-15 cm of 1/2"should be enough for .177)

and a 1/4" or 3/8" QEV valve... QEV is essentially a commercialy made piston valve of course you can build one yourself but QEVs are so cheap these days that you might as well take the easier route and buy one

you'll also need a pilot valve and a tire valve for filling the gun
(a blowgun would be ok for 300-400 psi gun )

I hope this helps... but still what I wrote earlier stays valid...


there is a lot of info here just spend some time reading it.. that should make things for you easier in the long run


What is a pca air rifle? I dont know of any decent Air rifle's for under 100$.
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Unread postAuthor: POLAND_SPUD » Thu Jul 30, 2009 6:43 pm

PCA stand for 'pre charged air'... a daisy bb gun is an example of a PCA rifle.. they have an inbuilt pump so the gun is fully self contained so you don't need a scuba bottle

the one I have I sharp innova 1110, it's a pretty cheap product, which is still quite good despite its low price
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Unread postAuthor: jackssmirkingrevenge » Thu Jul 30, 2009 7:34 pm

Alucard wrote:Allright, I thought about it alot, I want something like this But im going to put a rifled barrel on it with a outer shroud, if anybody can give me a link on a tutorial to build it/etc. I would be glad. I want it to shoot .22 pellets.


This is a fairly simple design to copy in terms of function - this is is how it works - but it depends on your material know how, are you good with metal parts/soldering/using high strength adhesive?

With regards to a barrel, if you want genuine accuracy get yourself a commercially rifled barrel.

I would tend to agree wioth POLAND_SPUD here though, consider a bigger calibre if you want something "different" from normal airguns, for example if you can get yourself a 50 cal muzzle-loader barrel even at lowish pressures (200-400 psi) you'd have one heck of a powerhouse.

If you have a SCUBA bottle with 3000 psi on tap, why not consider making a BB machinegun?
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