I make K'nex guns, specializing in semi-automatic, RBG-Slingshot hybrid systems which i use in most of my guns.
Note: I am not responsible in any way for any damage, injury, or death caused by my Instructables. You are totally responsible for any damage, injury, or death caused by my Instructables. Use common sense when using and/or making them. K'nex guns can be dangerous so do not use them irresponsibly.