Simple Durable Rubberband Gun

This is my durable rubberband gun.
U know how to assemble it as u see the photo.
I just want to remind 3 things...
1. The trigger is made by using a screw, u better add  washer to make it more durable.
2. There is a safety design :  try to use shorter PVC pipe to decrease the damage of the rubberband gun
3. If u don't like the rubber band placed under the pipe, u can add another clips which connected with wire.