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This is a simple pen gun you can make with no special tools in under 5 minutes. It's fun to use and shoots fairly far.
Just yank on the grip until the whole front end pops off. To get the cap at the back off, either gnaw on the end or use pliers.
First, pull or unscrew the front end. Then push down on the eraser and cut the inner cap (shown in black) off. Pull everything apart and you should ...
Make a cut roughly where it's marked on the picture. If you're unsure, leave more, not less, as you can trim it down later.
Cut the rubber band in half, and tape each end to the front of the pen (pictures 1 and 2). Add the piston from the pencil, and put ...
Stack all of the parts like this and squish them together. It will then look like picture 2.
To use the pen, first take the whole front part out. Load it with something small, like a knex or a wad of paper, pull the eraser back, ...
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