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I got bored in study hall one day (who hasn't) and I decided to make a pen gun without a rubber band. All you need is an eraser ...
Pen Pistolby MEEEEEEEEEEEEEEEEEEEE
Office Supply Pen Gunby SuePoo
How To Make a Grappling Gun from Office Suppliesby soxrawesome2
Simple Pen Gunby Chikpeas Brother
THE ANNIHALATOR (AKA the world's first fully automatic pen gun)by MFPOSGBCS
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