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.