My Knex M1 Carbine Model By smithinator in LivingLEGO & K'NEX1,307114Save PDFFavoriteIntroduction: My Knex M1 Carbine ModelBy smithinatorFollow More by the author: About: my top 5. 5.ajleece 4.Knex builder freak 3.The Jamalam 2.Barrax 1.YOU! More About smithinator »i think it is the first m1 carbine model on this site so give some credit