Step 1: Materials
Papermate kilometrico pen
Take out the pen end (I found it easiest to pull it off with your mouth) then take out the ink end
With pen bit and throw out pen cover now the pen bit with ink is your ammo. Now cut the other end of the pen off and trow it out.
Now cut the rubber band so it is one strait line
then place it on the cut end of the pen and stick tape it there securely.
Step 4: Finished
Now You have a pen gun
To fire place pen bit with ink tube in pen tube and pull rubber band with pen back and let go.(: