Introduction: Pen Gun

Picture of Pen Gun
Here is a really simple pen gun than is quite powerful and has a range of 20+ feet. I finnaly got around to making this instructable so I hope its alright

Step 1: What You Will Need.

Picture of What You Will Need.

you will need, Bic roundstick pen
2.sand paper
3.very small nail
4.lighter, candle or small drill bit(same size as nail) and drill
5.Plastic report clip.(peice of plastic that clips onto papers to hold them together but you can use about anything that can fit in the pen, blocks part of it off and can be cut to size)
6.Retractable Sharpie. (we need the spring from it)

Step 2: Ready the Pen

Picture of Ready the Pen

Remove tip and ink tube.

Step 3: Remove the Ink Tube

Picture of Remove the Ink Tube

Remove the ink tube

Step 4: Sand the Tip.

Picture of Sand the Tip.

sand the tip of the pen so it can slide out of the pen tube easily.

Step 5: Savage the Sharpie

Picture of Savage the Sharpie

Take apart the sharpie and remove the very large spring that fits perfectly in the pen tube.

Step 6: Ready the Spring

Picture of Ready the Spring

put a small piece of tape on the sping so it doesn't fly out when fired.

Step 7: Fire! Fire! Yea! Yea!

Picture of Fire! Fire! Yea! Yea!

use a candle or lighter to heat up the nail.

Step 8: Make a Hole

Picture of Make a Hole

make a hole through the pen tube and cap with the hot nail. (here is where you can also use a small drill bit.)

Step 9: Make Spacer

Picture of Make Spacer

cut your material (peice of binder clip, plastic etc.) so it is to size so it leaves room for the tip and fully compressed spring

Step 10: Aim and Fire

to load the gun just put the spring in the pen and jam the tip on the sping and insert the nail to lock it in place. to fire just aim and pull the pin


inoname (author)2014-06-16

It is good but only fires up to 20 feats check mine it fires up to 80 feats at

M4industries (author)2009-11-19

 After a few weeks of refining our design in our spare time, my friend and I made one that shoots 120ft and fired a sharpened knex piece out of the pen casing. It shot through quite a few pieces of cardboard. We used 4 rubberbands as a membrane.

 Hey! Make an instructable on that!

mo5 (author)2008-09-13

do you put the spring in first or do you put the pencil in first

Super Saiyan Jesus (author)2008-01-12

I made on of these once... the only difference with mine is instead of shooting pens i just fired the ink tube. Also, i used a rubber band instead of the spring.

mo5 (author)Super Saiyan Jesus2008-09-13

you suck rubberbands are horible

fosockingdude (author)2008-01-14


ich bin ein pyro (author)2007-04-11

oh but holes are advanced technology without them how would we breath

tubes, maybe? holes aren't advanced at all though, cavemen had 'em

but think without them we couldnt live like a door a one way valve speaker gaurd

true, but think about it, how are they advanced? i can make a hole with my hand. now something advanced, like a helicopter, now we may have problems making a heli with a hand.

tubes have holes in them yea but u dont think we invented to hole nature did caves dinosaurs

true, u have a point. but like i said, how are they advanced? things like boats and aircraft are advanced, holes are the building blocks for those kinds of things. holes themselves aren't advanced in any way. they've been around before our solar system was created.

Spl1nt3rC3ll (author)bigpinecone2007-06-06

I hate that commercial too. "Introducing the new advanced quick release system" They drilled holes in pills, I chew them, big deal. If they put microchip cellular inhancing nanobots in the holes... Thats advanced! Also, I have a tri pen that when you twist the clicky thing it goes from pen to mechanical pencil to computer touchpad pen. I'm looking for a pen shooting instructable I can mod with this so that I can have three rounds in one "clip". ~Peace

kaboomspray (author)Spl1nt3rC3ll2007-10-06

does it ave a laser pointer? Ive seen one that does,in cape cod

badhacker (author)2007-10-02

looks kinda complicated for a pen gun but it so cool when it shoots!

bigboom (author)2007-07-08


pyro22 (author)2007-05-14

:-) yea I know. I have a dog and cat who were shedding at the time and we hadnt vaccumed for a couple days.

blacksmithman (author)2007-05-13

omg ur floor is so dirty in this pic

tzual (author)2007-04-26

and.... do you put the yellow thing inside the pen and push it against the spring?

pyro22 (author)tzual2007-04-27

yes. The yellow thing is a spacer for the spring

tzual (author)2007-04-26

can i just use any other spring like those small ones?

i make shooting things (author)2007-04-11

I've noticed many videos have TV or Radio in background (just saying)
A little more complex than some designs but this might be more powerful than some.

pyro22 (author)2007-04-11

Also to clear it up i might be making a how-to video soon.

pyro22 (author)2007-04-11

sorry, I know it slightly confusing, but the last steps where hard to desribe. if you have any questions on it just ask.

About This Instructable




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