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
Step 2: Firering Pin
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
Step 4: Barrel Holding System
Step 5: True Trigger Mecanism
Step 6: Handle and Reinforcement Bar
Step 7: Final Assembly
Step 8: Barrel/Magazine
Step 9: Loading and Firering
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!