First, you need a pen, (obviously) then you take the whole thing apart, even the push-button if you can.
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Step 1: Build
Put the cap and the ink holder in, then put the spring in and then, the ink compartment in. Then screw the cap on lightly, so it does not touch the other piece.
Step 2: Look
This is what it should look like!
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Step 3: Finished
This is what it should look like when finished!
Press button to fire! Remember to screw the cap on lightly!!!!!