This is my biggest instructable ever and problably gonna be one of the most popular instructables on this website(my opinion). I introduce the world's first true fully automatic pen gun. No joke this thing is rapid fire full auto. The decided to come up with my own inspiration for this came to me when i was looking at some questions on the questions board about some people asking if there was such thing as a full auto pen gun or if it was possible to make such a thing. Well, after 3 weeks on collecting materials and studying mechanisms and doing research, my own. This can be considered as the machine gun of the pen gun arsenal after what i've seen such as the click pen gun, semi auto pen gun, and the trigger pen gun.i have to say that this will be a tough project to build, for anyone wanting to build this, and that gathering the materials will be a big job. Good luck.
Step 1: gather the materials
this is gonna be a tough task as building this pen gun requires lots of materials. You will need 3 rulers( 2 wooden and one plastic), a transparent ipod case, a mini vhs tape case, duct tape rubber bands( 8 big ones and 2-3 thin ones), knex cog wheel, 2 empty bic pen tubes, a blue knex piece, a small paper clip case, a white peg with a nail through it( i have tons of these as i collected them from the cable guys as they installed cable), and extremely sharp scissors and a exacto knife(optional).