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:

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
Please help me with in which order this would fit back into.<br>Thank you &amp; kind regards.
Please help me with in which order this would fit back into.<br>Thank you &amp; kind regards.
Hi Mate I'm in australia and my solenoid is different from yours just a little. <br><br>Q.do I leave the insides wen i screw it back up?
Can this gun kill a bird.? Can it take 150psi
<p>The sprinkler valve is only rated to 125 psi.</p>
<p>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/) </p>
<p>i want to modify this into metal pipe so it can withstand 150psi,and change the nozzle into size fit a marble...</p>
<p>The sprinkler valves are a diaphragm valve and they're only rated to max. psi. of 125. You would have to figure out another firing mechanism such as a QEV.<br>Make sure to use pressure rated PVC.</p>
<p>cool, looks like it would hurt though</p>
<p>Nice Instructable! I can tell you did some quality work</p>
<p>would a plastic bottle be good for the air gun?</p>
<p>for firing 0.68 inch bullet which size of pipes are preferable?</p>
where I found spring valve
Plz say we're u got the pneumatic trigger I could find 1
<p>This is really amazing gun so far i have seen. Good one.</p>
<p>Hey I mad your potato gun it is boss!!!</p><p>don't have a good picture of it so here is a random pic.</p><p>I'll post one later!</p>
<p>I haven't got any pvc cement... Any other idea?</p>
<p>What size is your sprinkler valve? 3/4in?</p>
For my air gun, I used a 1&quot; sprinkler valve. That's what I would suggest.<br><br>-KTC
im nathaniel did you like to share my fully upgraded powerful air gun by using denatured alcohol<br>
<p>thanks doing this for science fair</p>
Nice job! The finished product looks great! Hope you do well at the science fair:D<br><br>Thanks for sharing,<br>-KTC
<p>I am about to make it this is an awsome science fair idea thanks!</p><p>(I am giving you credit for the idea and instructuins in my paper)</p>
<p>Bro this thing is freaking ammazing !!!!!!</p><p>#sciencfairproject2014-2015</p>
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<br>Make a air gun post a pic of it here in a comment. I would enjoy seeing it:D
<p>how much air dose it hold an how do u know its filled</p>
Can I use a plastic bottle for the gas chamber
<p>Hmm.. wondering how you would mod it to shoot water balloons.</p>
I got it from winning a instructables contest.
Dude where did you that shirt!
<p>Nice design but I think I would load it before charging it in case you hit the trigger while loading.</p>
h y r f vh j v
<p>Very cool build. Looks good and is fairly portable. Great work!</p>
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.
<p>How much pressure is too much?</p>
If anyone watched myth busters last wk, they showed a longer barrel will produce more speed.
At what pressure did you shoot it?
Thanks for the feedback!
<p>nice air gun</p>
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. <br>
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.
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.