Knex Chain Machine Gun By Superpoopa in LivingLEGO & K'NEX2,747216Save PDFFavoriteIntroduction: Knex Chain Machine GunBy SuperpoopaFollow More by the author: About: home of the crossbow More About Superpoopa » Sorry about all the slide shows that have so little pictures, i just started to make instrutable slideshows and stuff. I give credit to knex21 for the design and the mechanism.