Step 1: Handle
2 white (yellow) 5-clip connectors
2 dark gray (red) 3-clip connectors
1 brown (orange) long 2-clip connectors
8 black (green) rods
1 silver (white) rod
2 blue spacers
Build everything in part 2. You can see how the rod with spacers goes on in the second pic.
Step 2: Barrel
6 black (white) 8-clip connectors
5 gray 1-clip connectors
2 brown (orange) long 2-clip connectors
1 dark gray (red) 3-clip connectors
9 black (green) rods
7 silver (white) rods
Build everything in pic. 1. Attach 3 black connectors with 2 black rods, twice. Put it all together as in the second pic.
Step 3: Trigger, Firing Pin
The trigger (find out how to build it at Trigger or just look at the pic.)
1 brown connector
1 small blue connector
1 green rod
Build the trigger the same way as the other one (you can use the link), but use a green rod.
Step 4: Assembly
3 medium rubber bands or 1 medium and 1 large
Use the pictures for help.