New Z35 Feature #1 By Oblivitus in LivingLEGO & K'NEX1,1444Introduction: New Z35 Feature #1By OblivitusFollow More by the author: About: I paint, write music, and used to build knex guns. I have a Bachelor's Degree in Studio Art. - updated 5/7/2014 More About Oblivitus » The Z35 instructable now has a new feature, go check it out! It is a firing pin guide.