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***Disclaimer*** The following is for informational purposes only, i take no responsibility for what you do with this knowledge. i can not be held responsible for any property or medical damages caused by this weapon. i would advise you to check your local laws. These types of guns are illegal in some areas, and i would highly advise you against building one of these in said areas. Pneumatic rifles can be very powerful and should never be pointed at a person or animal. Lastly when dealing with pneumatics never over pressurize them and always use NFS-PW pipe (as apposed to DWV)

well before we begin i must state a few things...

-PVC can only be used at half or less than half the pressure rating stamped on the pipe when pressurized gases are used in the pipe
-i would suggest never pressurizing this cannon above 150 psi, remember its only plastic
-never store any type of PVC pneumatic with pressure still in it
-always allow a full 24hours for PVC glue to dry before pressurizing
-when building pneumatics always use metal or PVC pipe (never ABS)
-PVC is shock sensitive meaning if its dropped on a hard its very likely it will be damaged and it would be very dangerous to pressurize after damaged
-PVC becomes very brittle below 32 degrees (Fahrenheit) and is very likely to explode if pressured in such conditions
-when building pneumatics pressure rated pipe should always be used (none of that cell core or DWV crap)
-the most important part of any pneumatic are the PVC welds AND I HIGHLY SUGGEST YOU READ THIS TUTORIAL before you even think about starting this.
-when you are dealing with high velocity projectiles always remember you safety glasses
-always be sure of your back stop when shooting any form of rifle, pistol, gun, bow.... anything that can fire some vague form of projectile
-and use common sense!
-do not use un-regulated HPA or CO2 in a PVC cannon ever they are stored at to high of pressures to be safe in PVC, but if you have a properly regulated setup they can be used ( if you lower the pressure to about 100psi)

Now onto the good part...

this is my entry for the launch it challenge, it is a 25MM Pneumatic Cannon. it has 2.5 foot long one inch diameter barrel with a custom bolt action mechinism, of course we have the 3-9X40 sniper scope, and a 1" modified sprinkler valve as the primary firing valve.

The Video...

Video
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remember always wear safety goggles, you never know where or when something will ricochet especially when its traveling at 300+FPS

Fun Fact: PVC shards can't be picked up by X-Rays (this is a safety tip! don't rush or you'll get a PVC shard in you and you probably wont get it out. im not saying you should sneak one of these into your luggage and go threw airport security. it would be way to big any way)

better video coming soon

If you like this instructable please register and vote for it in the launch it challenge (by click the plus icon next to the title)

DETAILED SPECS

power source------------------compressed air
power source pressure-----100psi
chamber volume--------------45 ci (approx.)
barrel volume------------------25 ci (approx.)
c/b ratio--------------------------1.8 to 1(approx.)
firing valve----------------------pneumatically actuated sprinkler valve (a "modded sprinkler" valve)
pilot valve-----------------------blow gun valve
fill valve--------------------------female quick disconnect
fire rate--------------------------single shot, bolt action
caliber---------------------------25MM ( one inch)
projectile velocity-------------unknown (coming soon)
effective range----------------unknown (coming soon)
maximum range-------------unknown (coming soon)
optics---------------------------3-9X40MM rifle scope
primary material used------PVC pipe

I WOULD SUGGEST YOU DO SOME RESEARCH BEFORE UNDER TAKING THIS PROJECT, LOOK INTO THE DIFFERENT TYPES OF PIPE AND THERE RATINGS, HOW TO SOLVENT WELD PVC (THIS IS A MUST), HOW TO PROPERLY DRILL AND THREAD HOLES FOR FITTINGS, THE TYPE OF CONDITIONS PVC CAN BE USED AND STORED IN. THE MAJORITY OF THIS INFORMATION IS CONTAINED WITHIN THIS INSTRUCTABLE BUT IT IS BECOMING CLEAR THAT MANY OF YOU ARE NOT READING ALL OF IT. I HAVE ONE FINAL SUGGESTION BUILT A BASIC PNEUMATIC OR COMBUSTION FIRST IF A BASIC CANNON FAILS IT WILL BE LESS DANGEROUS

PS - DON'T ATTEMPT THIS AT ALL IF YOU HAVE NO COMMON SENSE OR A LOW IQ

Step 1: The Parts...

we will be making this particular pneumatic out of mostly PVC so it is relatively inexpensive to make. here is what your going to need.

Parts...

( 1x ) 2" PVC cap
( 1x ) 2" PVC coupling
( 1x ) 2" to 1" PVC bushing
( 2x ) 1.5" PVC couplings
( 2x ) 1.5" to 1" PVC bushings
( 1x ) 1" PVC tee
( 2x ) 1" PVC 90 degree elbows
( 2x ) 1" PVC male threaded adapters
( 1x ) 1" to .75" bushing
( 1x ) .75" PVC cap
( 1x ) .75" PVC tee
( 3x ) .75" PVC 45 degree elbows
( 2x ) .75" PVC 90 degree elbows
( 1x ) female quick disconnect 1/4"
( 2x ) 3/8" by 1/4" compression fittings
( 1x ) blowgun valve
( 1x ) 1" sprinkler vlave
a few inches of 1/4" ID flexible tubbing
assorted bits of 2", 1.5", 1", and .75" pipe

Tools...

a dremel
a band saw
a drill (preferably a drill press)
PVC primer (make sure its primer and not cleaner or it could end badly)
PVC glue
<p>man, that was amazing, can you send me the file by email please? i cant download cuz i need a Pro membership. LOBOPLATEADO3131@GMAIL.COM. </p>
<p>Hello, first of all, congratulations for this great work, is impressive. I would like to ask if you think you could give pressure with a hand pump for bicycles. Thank you. </p>
I use a bike pump for mine and get to 100 psi easy.
I use a bike pump for mine and get to 100 psi easily.
One small step for man one giant leap for homemade nerd weaponry.
<p>Hello I would like constuir this rifle but do not understand much because my language is Spanish and some material names I get distorted in the translator , if possible please thank me send everything about the respect to my mail as I do not have I could not download the pdf of this good stuff, as this page will not let me thank you for your collaboration , greetings from Venezuela</p>
<p>I got fined 50$ for just walking around and shooting it at targets and a cop thought it was a real riffle</p>
<p>This is the airgun that my 13 year old son built for the Science Fair...he won his school division, city division and regional division...we went to the state level this weekend, but he did not win. His project was determining which style of handmade nail-dart was the most accurate based on the fin design. Nice project...he did a great job!</p>
<p>CHECK OUT MINES....THIS I NOT A TOY</p><p>https://www.youtube.com/watch?v=N1WO8DUrrl8</p>
<p>This is great! Thanks!</p>
<p>The video is unnavailable!!</p>
I just made one similar to this one but used a momentary switch as a trigger.
<p>That's so awesome i am going to try this.</p><p>I thought these were the best cheap airsoft snipers but wow..</p><p><a href="http://worldpremierairsoftcenter.com/top-5-airsoft-sniper-rifles-under-150/" rel="nofollow">http://worldpremierairsoftcenter.com/top-5-airsoft...</a></p><p>But for a home-made airsoft rifle this is so awesome!</p><p>How much did that cost? I would guess around $45?</p>
<p>can someone make me one I'll pay 50$ to 65$ for one kik me at kikzaden or snapchat me at zadenk plz reply if u can thx.</p>
<p>how did you mod the sprinkler valve ? </p>
<p>can u move the trigger up????</p>
<p>hay how much dose it cost????</p>
hello there I Hv gathered all parts and before I start making it a few questions..... how do you calculate air pressure in chamber. there is no psi meter. also can I attach psi metre on the left of quick disconnect valve?......
<p>I just wanted to ask is it possible that i could modify it to a paintball gun?</p>
Finally after a long search i ordered sprinkler valve online store. it is of Rainbird brand. it has one solenoid on top at one end. it is black in colour. i hope it will work,....
hello irwinner I Hv been looking and reading all this info here. it's greatly helpful. much better than other air rifles made from pvc. so far I Hv tried hard in and around my area to find Sprinkler valve but no luck. I recently found Sprinkler valve online store in USA. before I place an order I want to confirm that it is orbit open jar online valve with two sides open like in pic. but it has some black part attached on top. so if could just clarify then really I would go ahead. now I am just waiting for reply from you ..... till then I'll keep my fingers crossed.
<p>Is the sprinkler system a: &quot;orbit 1 in. NPT green jar top valve&quot;? <br>because thats the closest one i found i think it may be the same one. <br>Other than that i built it today and spent 75$ on everything, although i <br> had an air chamber built for a previous one i made, the valve was <br>already in it. So i re-used it because, it was the same exact design.So <br>if someone wanted to go make this now, id say depending where you live <br>it may differ( but im in PA) if ur buying the air chamber id say its <br>roughly $85 overall. Assuming (4-5$ for tubing, 4$ for fittings, and the <br> rest is tax).Ill post a pic once i finish it and paint it, im waiting <br>on the stupid orbit bulls#!% to hook stuff up, and test it.</p>
<p>Do you think I could modify the barrel to shoot crossbow bolts?</p>
<p>Can you provide a working link for the video? The pictures are great and all but I am more a visual person because I like to build my projects along with &quot;someone&quot; (in this case, the video). If not, that is ok. Either way, this is a great build!</p>
This is ganna sound stupid, but what's the best ammo for this rifle?
Marbles or Nerf Darts, worked for me
I'm thinking marshmallows would work well.
I think that they would explode on the way out. lol.
irwinner its wonderful work you have done can i change the barrel size to use it for paintball ammo
THIS PROJECT IS AWESOME!!!!!!!!!! Thanks @irwinner!
hi there! this is an awesome intructable! i was hoping to build it for a physics project. <br> but i was wondering if it were possible for me to connect the gas reservoir to the blowgun and subsequently connect it to the bolt assembly directly, and bypass the sprinkler valve? would it post any safety hazards, or reduce its power? <br>it is my first time building a pneumatic cannon, and i dont really know how these stuff works.
About to make this model, Upload images after its completion
And also: Why do u need coupling in the bolt action?
Hello all. I'm planning to build this one with few little changes to it. But i have only one problem considering this: When the bolt action is set up: the barrel itself will move up, or it will stay and the other piece with same diameter will move to the barrel? I just can't get it. Will you help me this?
i im thinking of making this about how much did it cost you?
This is a good airgun what is the projectile of this stuff reply me cause i made one and i appreciate your work good job...
instead of gluing the chamber in could you use a quick disconnect so you wouldn't have to keep refilling it and just swap chambers???
thats a god idea but the disconnect might be two small so you would have to use some reducers.<br /> but that would be a very good idea if you were using the gun away from an aircompressor... infact i might try that
yeah you could make it snap on and off to make a fast change air tank
Wouldn't that not work because the whole idea of the compression chamber is to quickly release the air? If you could do it that way you might as well keep it attached to the compressor and forgo making the compression chamber altogether. <br>
or use a real tank and have multiple shots. It's not the same. The whole concept here is a complete release in one shot. Hooking it to a direct infinite source requires a slightly different design. There are lots on here, just search.
Although, you could just carry a pressurized tank with a scrader valve filler attachment and use that to refill your pvc canister while in the field. Prolly a good idea to have a guage handy if you don't have one built in with the valve.
maybe u could hav a hwhole second tank with a female disconect at one end and a male discnnect at the other, so u could fill it at the commpresser and then when u wanted to use the cannon away from the commpresser u could fill from that
So if you pressurize the tank to 100 psi does it shoot well, and does tank size have a factor besides amount of shots?
Couple questions, do you have to use an air compressor to fill the tank each time can't you mount and second tank filled with air and leak it into the other tank to re-fil the main tank. This is a dumb one but I'm guessing you have to re-fill the tank each show right
and is it only one shot?<br>
i think my jaw just fell off my face when i saw that thing
Well, to get where I find this valve and how it would be worth it if I send him the money and buy a pro Brazil send me inside mines can give me an answer on my imail fjdutra@r7.com required urgent thank you for comprehension<br><br><br>Fabio Junio ​​Dutra
This is incredible! Have u thought about using paintballs or splatballs (from kmart) and a 15mm barrel to shoot them? This could be used with a spring feed, or just bolt action, for an incredibly awesome paintball gun! i have another air cannon (i lie, i have 3) and splatballs work great! u get them from kmart, or maybe walmart if ur in America?

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