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.
Step 1: supplies
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)