Project B By Johnhall44 in LivingLEGO & K'NEX46611Introduction: Project BBy Johnhall44IdonthaveasightFollow More by the author: About: My names John,I've been building with knex for 5 years And am currently working on a lever action tube fed shotgun =D More About Johnhall44 » This is Project B. It uses a tubular mag underneath the gun that you load like a shotgun. It uses the same stock as Project A and shoots white rods.