Picture of Air Duster Gun
Air Dusters arent just for cleaning things, they are also potential propellant. Here you will see how to launch small objects at reasonable velocity (i used erasers).
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Step 1: Lets GO!

Picture of Lets GO!
Ok, first lets go grab what we need. Of course you need the air duster with the little plastic straw. Nowdays this is available at Target and Wal-Mart or other places like that, along with electronics stores. Get whatever is cheapest, but it must have the plastc straw.

Ok, now we need a click pen. The one pictured works best (and they are mostly free from car delerships) because it comes apart nicely.

We also need a lighter, or like i did the first time you can use a stove if you are really carefull. A projectile can be found later, i use erasers from cheap pencils.

DISCLAIMER: this project can possibly injure somebody. I am not responsible for any injuries, damages or deaths related to the fabrication or usage of this product. Allways use common saftey sense and proper saftey equipment while fabricating or using this product. It can shoot over 100ft and still sting a little.
This was origionally posted my me at (

Step 2: Pen to Barrel

Picture of Pen to Barrel
Now we have everything lets get going. Take the pen apart as shown. You don't need anything but the outer casing and the pointy plastic tip. Take the spring and flick it across the room for you to find later (or don't).

Now take the plastic straw from the air duster and stick it into where the ink tube was not so long ago. It probably wont fit too snugly so this is where the lighter (or stovetop) comes in. CAREFULLY melt the tip untill it's barely soft and roll it on the desktop to shrink the diamater of the tip to fit the straw fairly snugly.

It should be fairly difficult to pull it off of the straw because it will be holding pressure later. Now we need to finish up. If my vague discriptions haven't helped, the pictures should help.
RayJN1 year ago

Did you know difluoroethane when involved in a fire fumes include carbon dioxide, carbon monoxide and HYDROGEN FLUORIDE?

Glass and ceramics are corroded by Hydrogen Fluoride.

nathan414928 years ago
Would an airsoft BB fit in there? That would hurt a lot more!
I bet it would.....
I have made plenty of airsoft guns with pens like that, and airsoft BB's fit fine in them. The only problem that I can think of with an airsoft BB is that the compressed air might go right past the BB, so you might want to use some oil as in step 3.
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i did that to a flower and it shattered... are you thinking what im thinking (razor sharp ice bullet)
For an ice bullet, you have to slowly cool it so that the ice crystals are bigger. That way, it is stronger.
hmm, first time i heard that, i'll give it a shot with blunt ones once i get my air duster (2 dollars a can, how cheaper can it get?)
shadymilkman (author)  mrbob10008 years ago
if you decide to do an ice bullet, please be carefull. I dont want to hear something on the news about some guy shooting somebody to death with 'razor sharp ice bullets.' it would be pretty cool tho......
beehard443 years ago
guess what they have adapters to use these in airsoft guns!
maybe i can use this for my current sniper project...
sharlston5 years ago
It only costs a few bucks in the states, you could probably buy it off the net. If they have it in the UK but probably not called the same thing, here it's usually sold in any electronics department usually next to stuff like monitor wipes, sometimes described as keyboard cleaner.
crayzclown16 years ago
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shadymilkman (author)  crayzclown16 years ago
You really shouldn't do that bla bla bla.... Seriously, it kills your brain pretty bad. There are few things out there to get high off of that are worse than this. Huffing gas and ether are the closest things I can guess. Deprives the brain of oxygen.
<> These dudes know a lot. Check it out.
deansep7 years ago
At close range you can probaly hurt someone right? With the right object and stuff. If so then let me know. Then I can add it to my group, That Hurts.
if you use tacks, then yes
deansep deansep7 years ago
It also says Possibly injure so yes of no?
hey! i saw a video on this exact same thing do you do those videos!?
maxiscool8 years ago
I did it, but mine only goes about 20 feet. Beside from the fact that my can of Dust Off is almost empty, what could be the problem here?
shadymilkman (author)  maxiscool8 years ago
did you try to put some oil down the barrel with the eraser, also try not to shove the eraser too deep. A full can is also quite helpfull
look at my profile and see the modification I made.
Dieffsta8 years ago
haha cool. about how far will it shoot certain items? just curious
oh im stupid...i coulda just read it haha
Magicfap8 years ago
nice!, i have to try this! (razor sharp ice bullets rule!!!!)
mrbob10008 years ago
try some air soft bb's
shadymilkman (author)  mrbob10008 years ago
i would have, but i dont have any. I'm not sure if it would be big enough to seal off the barrel.