Examples

Build Your Marshmallow Air Gun

Build your own PVC air gun with our easy-to-follow instructions and start shooting in no time.

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Build Your Marshmallow Air Gun: architectural sketch illustration

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DIY Marshmallow Air Gun – around here, we here spell the word ‘fun’ m-a-r-s-h-m-a-l-l-o-w a-i-r g-u-n.  

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A PVC air “gun” uses compressed air to launch small objects long distances. The air is compressed by human breath, and is released through an escape valve that launches the projectile. This can be a small ball, a water-filled balloon, or… marshmallows! 

This launcher can reach up to 40 feet with just one breath of air. The design uses ½ inch PVC pipe and fittings, and it’s entirely customizable and upgradeable. 

Just connect the pieces and have fun!

Ideal for: fun. 

Ready to build your own? Great! Just check out the DIY build guide and diagrams below to get started. 

Instructions

A note before starting. 

Please understand - the below diagrams are genuinely and carefully designed to help you navigate the build process. However, we don’t include specific recommendations for which tools, hardware, and products to use, and so on. These truly are “DIY” designs. 

We do, however, have a few generic recommendations for working with PVC. 

  • Please, make sure that any tools you use are designed for PVC. If you find yourself needing to cut or drill, please use PVC-appropriate bits and saws. 
  • Gluing is a popular, fast, and effective method for attaching PVC pipe and tubing. Please ensure that any epoxy, cement, or glue you use is appropriate for both the materials and for your intended uses. And as always, please be safe! 

Ready to build yours?

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How to make a pump marshmallow gun

PVC marshmallow air gun assembly diagram, step 1

Step 1 

First: the forward grip and barrel assemblies. 

Using the diagram above, gather all the necessary parts. 

Then connect them as shown, using the diagrams and visuals as a reference. 

Once this is done, ensure that all the pieces are permanently connected and sealed; and then set the barrel/grip assembly aside for now.

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PVC marshmallow air gun assembly diagram, step 2

Step 2

Time to give your marshmallow gun a “highly accurate” scope. 

Using the visuals for reference, assemble the above pieces in the manner shown. 

Once you’re done, set your scope aside for now.

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PVC marshmallow air gun assembly diagram, step 3

Step 3

Next, you’ll be making the main “frame” of your gun: the stock. 

NOTE: for this step you might want to make sure and gather all the necessary parts, and then lay them out on a flat surface in the way that they will be assembled. This will help you construct/affix these parts quickly. The reason we recommend this: the frame has to remain has to remain somewhat flexible in order to attach the last few parts. 

So, we recommend getting everything together, and then assembling the parts in a “circular” manner. 

In other words: start with your 4-way outlet, and then move clockwise, attaching each piece as you go until you get back to the 4-way. 

Once you’re done, you can set your finished gun stock aside until step 5

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PVC marshmallow air gun assembly diagram, step 4

Step 4

You’ll need an air entrance for your gun to work. 

For this step, just attach the pieces as seen above, and then set them aside.

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PVC marshmallow air gun assembly diagram, step 5

Step 5

Almost done! 

Now, you can go ahead and finish assembling your gun. 

You should be able to do this in just three easy steps. 

Just attach your barrel to your scope mount; your scope mount to your stock, and your air entrance to your stock. 

Once you’re done: please remember to let your finished creation dry/cure properly before putting it into operation. 

And that’s it! 

Happy marshmallowing!

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Marshmallow Gun Kit Parts List

16 parts

  • 1/2" Tube - 3" Length

    PVC - Standard PVC

    Quantity
    8
  • 1/2" Tube - 6" Length

    PVC - Standard PVC

    Quantity
    1
  • 1/2" Tube - 10" Length

    PVC - Standard PVC

    Quantity
    2
  • 1/2" Tube - 5" Length

    PVC - Standard PVC

    Quantity
    1
  • 1/2" Tube - 9.64" Length

    PVC - Standard PVC

    Quantity
    1
  • 1/2" Tube - 2.9" Length

    PVC - Standard PVC

    Quantity
    1
  • 1/2" Tube - 7.29" Length

    PVC - Standard PVC

    Quantity
    1
  • 1/2" Tube - 5.4" Length

    PVC - Standard PVC

    Quantity
    1
  • 1/2" Tube - 4.2" Length

    PVC - Standard PVC

    Quantity
    1
  • 1/2" Tee Female Slip PVC

    PVC - Standard PVC

    Quantity
    3
  • 1/2" x 1" Reducer Slip PVC

    PVC - Standard PVC

    Quantity
    3
  • 1/2" 90° Elbow Slip PVC

    PVC - Standard PVC

    Quantity
    3
  • 1/2" Coupler Slip PVC

    PVC - Standard PVC

    Quantity
    1
  • 1/2" 4-Way Outlet Slip PVC

    PVC - Standard PVC

    Quantity
    1
  • 1/2" 45° Elbow Slip PVC

    PVC - Standard PVC

    Quantity
    5
  • 1/2" Cap Slip PVC

    PVC - Standard PVC

    Quantity
    1

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