all you need for the pencil gun is one mechanical pencil, scissors, and yourself
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Step 1: Cut It,cut It Hard
take the pencil head cap off,push the trigger(make sure that the round piece is forward) and cut on the red line like in my picture
Step 2: Push and Shoot
use your fingernail on the rim of the trigger,when you have full power,release the pencil
Step 3: Kill All Humans
with your new toy