Instructables

Pneumatic sniper rifle

Picture of pneumatic sniper rifle
This is a a great begginer project for someone who wants to build a pneumatic potato gun. pricing is reasonable, being around $50- $60. took me only an hour to build. The only thing that i would change is the handle, it shold be bigger to hold more air. I havnt found the range yet because I am not sure how much pressure it will take. I dont want pieces of pvc stuck in myself!


read final page for legal.

ps. sorry about photos, my camera is broken so I have to use a phone.
 
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Step 1: Parts

Picture of parts
WARNING: MAKE SURE ALL PARTS ARE PVC PRESSURE FITTINGS

-3 of 25mm 90degree elbow
-25MM TEE
-25MM PIPE
-15mm pipe
-2 of 25MM vavle socket
-25mm h/style/w/o valve solenoid
-20 by15mm reducing co
-tape (optional, added for strength)
-clear tube ( will jam into trigger without leaks
-air trigger
-schrader valve (car tyre valve)
- a bit of brass (u will need to thread this and drill through the middle) see pictures.
-pvc glue

Step 2: Construction

Picture of construction
MEASURE! then cut
Glue the parts together, prime if u think necessary
making sure everything is straight becuase pvc glue dries extremely fast!
Dont forget to put in the schrader valve as well.
Now tape up the tubes, i used a roll of electrical tape.


Step 3: A closer look

Picture of A closer look
The sprinkler valve was taken apart
-a hole was drilled in the top, on an angle
-the hole was threaded

The piece of brass was cut down
- a hole was drilled through the middle
- one end was tappered using a file
- the other end was threaded using a TAP AND DIE SET
- the brass was then screwed into the valve with plumbers tape to stop leaks.
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thanks a lot man i apretiate your creativenes
tigerboy6 years ago
what about modified co2 cartridges??????
that would be sweet, u could use a co2 inflater, which r used 2 fully pressurise tyres in seconds, wich would be epic
true
it would be awesome. but i recommend using steel as a material instead for co2 cartridges, depending on the size. they hold appox. 900 psi in those little tanks.
you get   a check valve with a pressure valve and 125 psi regulator and your set to use it with pvc.
shatterfrag4 years ago
do you have the smaller end of the blowgun capped so the air isnt lost? i need to know because i am building one of these for a physics project.
Nerfgenius4 years ago
A good way to make a air tank is with a coupler, much bigger PVC, a cap that fits the PVC and super glue to hold it all together.
samdaman5 years ago
do you need the brass piece cos i don't understand. i've never made anything like this before
some modifications i did to mine: quick disconnect with CO2 tank with a regulator set at 80psi. the trigger was tapped directly into the top and the sprinkler valve was turned 180 degrees from this one. a better stock (more volume of air) I used 1", perfect for bouncy balls. also I have a blow off on the gun itsself on the air chamber incase of any kind of CO2 bursts into the chamber (150psi) but the trigger or sprinkler valve would fail before this PSI is reached. as soon as its repaired (from a valve fail at 120 PSI, trigger blew out) I may have a picture of it up.
stick-69 (author)  The Expert Noob5 years ago
LOL nice, bouncy ball gun. I found that mine will shoot those small precision screwdrivers if i tape the ends for a better seal, I wouldnt recomend it though.
Does it matter that the chamber is so small? Would increasing the chamber size increase performance?
yes and no, if you decrease the size of the barrel it will go much faster and farther BUT it will shoot smaller projectiles, the oppisite is true for bigger barrels
zach126 years ago
and where is the schrader vavle?
Johnthan zach125 years ago
I would guess the black peace with the hose coming out of it.
Sorry buddy, schrader valve is the valve used to full the pressure chamber with air, generally people get them from old bike inner-tubes
zimmemic255 years ago
these pics are better than mine and i use a canon powershot A 60 (i think).

and if you like shooting potatoes, try tomatos! they are muuuuuuuuch more fun...
Giller126 years ago
is it really illegal
anything that shoots a projectile (even spitwad straws) is illegal. but who cares?
the cops do!!
they carry guns! they should be arresting themselves.
ye lol!
lol xD. You have a point. :D
no, your wrong, anything that fires (or can fire) objects at a deadly rate. if they even think it can, or looks like it can or looks like a gun, the fuzz is going to take it away, and you'll get a fine...
just don't use it in public!
well, I guess I forgot to add the being seen in public with a projectile launcher including a spitwad straw is liable to be confiscated add/or given a fine. it doesn't have to be deadly.
huh, i didn't know that... but i doubt the cops will give you a fine for it, right?
who knows? we do have the right to bear arms, but not to frighten people with them.
well... if it's "deadly" you have to get a permit to make it/keep it/us it. you know how THE MAN is...
still, you can't just walk down the street with a rifle even with a permit.
"make it/keep it/use it" you can't get a concealed carry permit for an airgun...*i think* you can for a real gun though... but as long as you can avoid THE MAN... lol
do I smell bacon? lmao
... bacon?
cops = pigs
pigs = bacon
bacon = cops
yum...
lol put a paralyzing dart in the barrel and shoot at nasty cops AHHAHAHAH lol and paintbalss!! PWND
Kaiven5 years ago
Can you help me? I bought a different valve, it had a hole in the center of the diaphram. When I pumped the gun, the air pressurized, but when I pressed the trigger, the air came out the blowgun trigger instead of the barrel. So I plugged the diaphram, and now the air comes out the barrel, but the trigger doesn't stop the air from coming out. DOes your diaphram have a hole in it? Does it need to be there? I would like and answer ASAP. Thanks.
don't worry!
the trigger (or pilot) valve releases air that is stopping the valve from opening, the air that comes out of it is just from the pressure of the valve opening... there are some diagrams you can look at, but it's all good, it's doing what it's supposed to. i was conufused at one pont too, so i read up online... you should too.
good luck!
zach126 years ago
where can i get the trigger thing
home depot
I FIGURED OUT HOW SUPAH VALVES WORK! GO TO SPUD TECH LOW POWERED PNEUMATIC LAUNCHERS THEN CLICK ON THE ONE WITH TWO CHAMBERS AND SCROLL DOWN TO THE ONE WITH JOEL HOLDING THE GUN AND LOOK TO THE RIGHT OF THE PICTTURE AND YOU CAN SEE THAT SUPAH VALVES ARE JUST PISTON VALVES> SORRY
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