Cut out each chopstick and tootpick. Glue the chip of each chopstick.

1 Drill holes and insert stop pins to each lever. (the height of pin is 3 mm)
Glue pivot bars to each lever.

2Drill holes and insert stop pin to the frame. And glue the barrel to the frame.

3Attach the muzzle bar to the barrel chip with a rubber band.

4 Put levers on the frame and wrap a rubber band as a lever spring.