Picture of automatic blowpipe
The blowpipe made of a pen body or a drinking straw is a very common school and office weapon because it is very easy to make.

It can deliver high-speed spitballs over distances up to 15 meters (16.4 yards) (depending on the type of projectile that is used and the blowing technique)
It also has good accuracy (depending on the length of the "barrel" and the type of projectile used).

But most of the battles occur at close range, where you do not need the big range and you also don't need high accuracy. In close-range battles you need something that would shoot a maximum amount of spitballs in a minimum time.

And that is what I want to teach you to make.
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Step 1: Supplies

Picture of supplies
you'll need:
1.drinking straws or pens, the outer surface of the pens should be without facets and their internal diameter should be the same. (you'll need a piece of straw anyway.)

2.small scissors and x-acto or paper knife for the straws, drill for the pens (if you have some skill you can use an X-acto knife instead of the drill)

3.CD-pen (you can use anything that could write on plastic and is permanent)

4.hacksaw for the pens(again, an x-acto knife and some skill will do the job, too.)

5.super glue or glue gun(the straws dont like hot glue 'cause it's hot)

Step 2: Cut the pens

Picture of cut the pens
1. disassemble the pens(if you use straws, skip this part)
2. cut off the narrow part of the pen

Step 3: Make fishmouth cut

Picture of make fishmouth cut
make a half-circle (fish mouth) cut on one end of one of the straws, if you use pens, try to drill it or to cut it out with x-acto knife.

Now press the straw/pen with the cut to the other straw/pen as shown on picture and check if it fits together. if it doesn't, correct the shape of the cut a little bit and check again.
Do this until they fit (almost) ideally (if you use hot glue you don't need much accuracy.)
sergio004 years ago
why you have to leave a slit?
flashcactus (author)  sergio003 years ago
to let the 'lock' element slide into the feeder and obstruct it, so that no rounds fall in the barrel and no air escapes
it isnt working for me now matter how hard i try. i try doing it but it isnt working.... Rating: 7/10- Good
wat do u mean it works for me
camoguy15 years ago
Maybe make a more durable one with bic pens?
flashcactus (author)  camoguy15 years ago
уоu would have to have a lathe to shape the clips and the feeder if you want to make them from pens.
thing 25 years ago
If you use big enough straws, you can use bbs!
GEEK15 years ago
great instructables I've been making these for sometime but whenever I blow the ammo comes out of the clip. but i think it may work now. Also I use the tongue method!! Yay!! I'm not the only one.
thing 25 years ago
caco caco6 years ago
i would try wiht pens
blowfo6 years ago
firstly don't say not to critisise otherwise people will just to annoy u but this is a great Instructable and I will make it when I find something with a good size barrel
bowmaster6 years ago
This is really cool! Most blowgun instructables that use straws suck but not this one! 4.5/5 stars!