How To Make A BB Machine Gun For $5 - Easy Hand Powered Airsoft Gun

This DIY airsoft design is one of my all time favorite projects. It’s super inexpensive and can be put together in just a few minutes since it’s only made from two parts! A pen tube could be substituted as the barrel to make the project even less expensive, though a little less accurate. As with all airsoft guns, eye protection is required for safety! The parts used in the video were a 24oz soda bottle and a 5/16” x 8” brake line (for the compact version), or a 5/16” x 28” brake line for the longer model.