In this tutorial I'll show you how to make a high powered air gun with PVC and miscellaneous parts that you can find around your house or at your local hardware store. This gun has a low volume high pressure air tank and a short barrel to maximize the projectile's velocity. It is equipped with a modified sprinkler valve to release the pressurized air instantly. The air gun can shoot potatoes or anything that can can fit into it's 1/2' barrel.

Watch The Video:

Notice: Please be safe when following this Instructable. I am not responsible for any injury or damages you cause as a result of building or using this air gun. Use gun safety; do not over-pressurize the air tank and never aim or fire projectiles at anyone or anything other than the desired target.

Step 1: What You Will Need:

Picture of What You Will Need:

Parts/ Materials:

  1. 1/2'' PVC Pipe(1'-5" Section)
  2. 1''-1/2'' PVC Bushing(SLxSL)
  3. 1'' PVC Pipe(1-3/4" Section)
  4. (2x) 1'' PVC Male Adapter(SLxTH)
  5. 2"-1" PVC Bushing(SLxSL)
  6. 2" PVC Pipe(2-1/4" Section)
  7. 2" PVC Coupling Slip
  8. 2" PVC Male Adapter(SLxTH)
  9. 2" PVC Threaded End Cap
  10. 1/4" Threaded Brass Coupling
  11. Threaded Shrader Valve
  12. Sprinkler Valve
  13. Pneumatic Trigger

Tools/ Adhesives:

  • Saw/ Pipe Cutter
  • Drill
  • 3/8" Drill Bit
  • 1/2" Drill Bit
  • Phillips Screwdriver
  • Adjustable Wrench
  • PVC Primer
  • PVC Cement
  • Epoxy
  • Painters Masking Tape
  • Spray Paint(Optional)
  • Air Compressor
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NoaM11 month ago
Nik NurI1 month ago

i want to modify this into metal pipe so it can withstand 150psi,and change the nozzle into size fit a marble...

WarriorBeast3 months ago

cool, looks like it would hurt though

jamestav4 months ago

Nice Instructable! I can tell you did some quality work

aevertido4 months ago

would a plastic bottle be good for the air gun?

maharshis5 months ago

for firing 0.68 inch bullet which size of pipes are preferable?

rasel885 months ago
where I found spring valve
Peter xd335 months ago
Plz say we're u got the pneumatic trigger I could find 1
rajeevcool7556 months ago

This is really amazing gun so far i have seen. Good one.

salman3558 months ago
Can this gun kill a bird.? Can it take 150psi

I made this potato gun and It can safely take about 100 psi ... If you use nail darts and have good aim, and give it a 2.5 foot barrel it will kill a bird ... here is a link for nail darts (http://www.instructables.com/id/Reusable-Water-Resistant-BlowgunAirgun-Darts/)

connorr2 made it!8 months ago

Hey I mad your potato gun it is boss!!!

don't have a good picture of it so here is a random pic.

I'll post one later!


I haven't got any pvc cement... Any other idea?

TrevorW9 months ago

What size is your sprinkler valve? 3/4in?

KyleTheCreator (author)  TrevorW9 months ago
For my air gun, I used a 1" sprinkler valve. That's what I would suggest.

im nathaniel did you like to share my fully upgraded powerful air gun by using denatured alcohol
maxwesterman made it!9 months ago

thanks doing this for science fair

KyleTheCreator (author)  maxwesterman9 months ago
Nice job! The finished product looks great! Hope you do well at the science fair:D

Thanks for sharing,
connorr211 months ago

I am about to make it this is an awsome science fair idea thanks!

(I am giving you credit for the idea and instructuins in my paper)

connorr21 year ago

Bro this thing is freaking ammazing !!!!!!


KyleTheCreator (author)  connorr21 year ago


KyleTheCreator (author) 1 year ago
I haven't really measured how much volume is in the tank but I use the psi gauge on my blow gun to check the pressure of the tank... I normally fill it to around 80 psi. If you
Make a air gun post a pic of it here in a comment. I would enjoy seeing it:D
covertopps1 year ago

how much air dose it hold an how do u know its filled

Hmm.. wondering how you would mod it to shoot water balloons.

KyleTheCreator (author) 1 year ago
I got it from winning a instructables contest.
tweet22971 year ago
Dude where did you that shirt!
IamGutter1 year ago

Nice design but I think I would load it before charging it in case you hit the trigger while loading.

KyleTheCreator (author) 1 year ago

Very cool build. Looks good and is fairly portable. Great work!

KyleTheCreator (author) 1 year ago
In the video I shot it at 80 psi. The heavy gauge PVC parts have a 250 psi max pressure rating... Personally, I wouldn't go too much over 100 psi.
dudleyjohn1 year ago

How much pressure is too much?

Goatar1 year ago
If anyone watched myth busters last wk, they showed a longer barrel will produce more speed.
KyleTheCreator (author) 1 year ago
Thanks for the feedback!
KyleTheCreator (author) 1 year ago

nice air gun

KyleTheCreator (author) 1 year ago
That's a good question... I would give a rough estimate of around $35 for the parts and materials, plus the cost of the adhesives and paint, but it could be pretty cheap if you had some of the supplies already.
Randumb831 year ago
Hey, I was wondering around how much did this cost.
put a cap at the end of the barrel and drill a hole. It the barrel then add a straight brake line big enough for the bbs.
KyleTheCreator (author) 1 year ago
You probably could if you used the right adapters, but I personally wouldn't recommend this because there might be too much pressure for such a small barrel diameter.
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