Semi-auto Rubber Band Gun - 2 Part

This is a remix of gtcdman27's "Rubber band gun simi auto". I took his two parts and made a piece that would fit the two halves of the barrel together. It is keyed so it is pretty hard to mess up. It should fit together. If it doesn't fit then I would recommend filing/grinding the sections that are too big. Once it fits together nicely, glue the two sides together with the glue of your choice. Then get all of the pieces where they are supposed to go and inserted the pins. You don't have to use t