Here's a video in which i use my gun. The purpose of the video wasn't on the gun so don't complain and im speaking french in it. Go to 2:15 minutes to see the gun in action. Little different version but same concept.
Link to this video on youtube
Step 1: Stock and Firering Pin Guide
The layer is five pieces.
Step 2: Firering Pin
You wil have to cut away some pieces of plastic with pliers on a yellow connector and some plastic on the gray rod. Add some black tape to reinforce the gray connectors and yellow piece (gold for me).
IMPORTANT!! The length on the rod must be modified so that only the grind up part goes in the black pieces. You will have to undo the gun to make sure the grey rod is just the right length. Only the front part of the gun and the back part with the stock and firering pin guide.
Step 3: Top Part of the Gun
You will have to cut away some plastic again! Just a grey connector...don't wory.
Step 4: Barrel Holding System
Have to can away stuff again.
Step 5: True Trigger Mecanism
Step 6: Handle and Reinforcement Bar
Step 7: Final Assembly
Step 8: Barrel/Magazine
Step 9: Loading and Firering
Load up the barreles with white rods. Then, wind up the shaft of the barrel like in the picture. Two turn is the minimum required for the proper function of the gun.
Now, it's time to adjust the length of the firering pin. Check the last picture to know how it should look.
To fire, pull the yellow connector back and press on the trigger!