Knex Grenade Launcher (TGKT Entry) By jawlecks in LivingLEGO & K'NEX4,561335Save PDFFavoriteIntroduction: Knex Grenade Launcher (TGKT Entry)By jawlecksFollow More by the author: About: . More About jawlecks »Here is my entry for TGKT. Trigger credit to Viccie.B1993