Instructables
Picture of Party Popper Pen Gun
>This is a simple & easy to make a BB firing pen gun that only requires a few household items.                                                                                                                                                                                                                 >When fired it can travel up to >25ft (7.5 Metres).
 
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Step 1: Items

Picture of Items
To make this you will need the items in the image above...

Step 3: Preparing The Party Popper

Picture of Preparing The Party Popper
explosive.jpg
Simply remove the explosive part by taking off the cardboard disks & confetti then pulling it out with some plyers

Step 4: Assembling

>To assemble start of by putting the explosive through the end of the pen.                                                                                                                                                                                                                                                                                                                 >Then tape it onto the end of the pen where the button would be as the BB wouldn't fit through this end.

Step 5: End+(Optional)

Picture of End+(Optional)
taped up.jpg
>Now just put the BB into the end of the pen & full the string to fire.                                                                                                                                                                                                                                                                                       >Optionally you could use the party popper to cover the end to stop some of the pressure escaping. Do this by making the party popper wider at the top by using a knife, then thread the string through & tape up the end.
inoname6 months ago

It is cool.But it don't has a good firing range any one could check out mine at

http://www.instrucables.com/id/pen-gun-15/

it fires ink cartrages up to 80 feats