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In this EASY instructable, I'll show you how to make a super cool bb pen gun with just a few items.

Here's what you'll need -

  • A white board marker pen
  • A regular pen with an internal diameter of 6mm (Stabilo Point 88)
  • Barbecue lighter
  • Rubbing alcohol or Isopropyl alcohol
  • and some miscellaneous tools and items that will be discussed in each step.

*PLEASE READ*
If you decide to attempt this project, then you are responsible for your own stupidity - Try this at your own risk. There may be risks of which I am not aware. Even though I've called this project 'safe to use indoors' , use the proper safety equipment and have a fire extinguisher handy if possible. Do not fire these rockets at humans, animals or property that does not belong to you. Stay safe and have fun!

Step 1: Watch the Video!

The easiest way to follow along with this Instructable, is to watch the video above or on my channel by clicking this link - http://bit.ly/1ODLIwG


Step 2:

Find yourself a white board marker pen.

Step 3:

Next, you'll need to take the pen apart using a pair of pliers.

We'll use this piece as a blast chamber. (Picture 2)

and this piece will become the muzzle. (Picture 3)

Step 4:

Find a barbecue lighter and remove the igniter from inside.

Then find a drill bit that matches the diameter of the igniter and drill a hole at the back of the blast chamber.

Step 5:

Heat up a small screwdriver or nail and pierce a hole at the back of the blast chamber like this.

Step 6:

Cut the wires on the igniter to about half an inch and then insert the igniter, with the bottom wire, into the hole you drilled earlier.

Step 7:

Push the other wire through the smaller hole that you made and use hot glue to hold everything together and create a tight seal.

Wrap the blast chamber in electrical tape or paint it to give it a custom look.

Step 8:

Find a pen with an internal diameter of 6 millimeters.

Cut off the ends and remove the ink cartridge.

This will be the barrel of the pen gun

Step 9:

Grab the muzzle piece and drill out the front to make a hole big enough to accommodate the barrel.

Apply some hot glue on both ends to hold it in place and give it a tight seal.

You might want to wrap the muzzle in electrical tape to match the blast chamber. Of course, this step is optional.

Step 10:

To load your pen gun, dip a cotton bud in some rubbing alcohol and apply it to the inside of the blast chamber.

All you need to do now is load a bb into the back of the barrel.

Then assemble your pen gun and then press the igniter to fire!

If you'd like to see this in action, just watch the video below. Subscribe to my channel by clicking here - http://bit.ly/1ODLIwG

You might also like this instructable - Mini ROCKET LAUNCHER

Watch the video below

Awesome!!
<p>You might also like this - <a href="https://www.instructables.com/id/Mini-rocket-launcher-1/" rel="nofollow">https://www.instructables.com/id/Mini-rocket-launch...</a></p>
Very nice, I like it
wikidly awesome
Hey man wanna know what kinda rubbing alcohol did u use 70% ethanol or more
Awesome, how far will it shoot?
I couldn't range this pen gun. I tried to get 20 feet out of it but it probably goes beyond that cos my 50 ft open plan living room + kitchen was too small. It ricocheted all over.
<p>Sounds pretty powerful!</p>
<p>hey CorgiCritter, on your profile picture i realise you have a pen that can be turned into an epic self defense weapon. just copy the link:https://www.instructables.com/id/Secret-self-defense-pen/ </p>
<p>dude your crazy</p>
<p>dude your crazy</p>
Amazing
<p>so cool!</p>

About This Instructable

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Bio: I am a photographer and ex-Engineering Student with more than just a curious mind. I use my knowledge about photography and basic engineering to create ... More »
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