MADE FROM 2 PARTS: PART 1 IS ONE HOLLOW BAMBOO LENGTH W/ 3/4 SPLIT IN HALF LENGTHWISE. PART 2, THE BARREL, IS SMALLER BUT SAME CONSTRUCTION. BOTH PARTS ATTACHED BY WOODEN NAIL. TRIGGER CUT FROM BAMBOO IS ATTACHED TO SIDE OF PART 1 BY METAL NAIL. THERE APPEARS TO BE METAL ROTATOR IN THE INTERIOR FOR TURNING TRIGGER. ACCORDING TO CATALOG, MADE IN 1987.