3D Printed Parts: - print 1 launcher in ABS - print 1 hose barb in ABS Other: - Acetone or ABS-Acetone Slurry: to smooth and seal the parts, and to join the hose barb piece to the main piece -1/4"ID air hose, one end attached to air compressor - Zip ties or pipe clamp for hose barb - Piece of wood as a base & screws for the holes in the legs - big O-rings to fit on launcher