Knex Red Dot Sight By koenykoen in LivingLEGO & K'NEX1,903434Save PDFFavoriteIntroduction: Knex Red Dot SightBy koenykoenwww.instructables.comFollow More by the author: About: hy i am koen More About koenykoen »Step 1: Step 2: Dual Scope and Red Dot on a Gun.