How to Make a Mini Dart Gun w/Multiple Configurations

I've been playing with the idea of what cool things I might be able to do with soda bottle preforms for a little while now and this is what I've come up with. The dart gun in this video uses two different firing methods that are commonly used in larger potato cannons, a pneumatic firing option, as well as a simple combustion option. A coaxial piston valve is my personal favorite mechanism for these sort of projects, and this video shows how it works quite well through the clear chamber. For the combustion design the fuel of choice is isopropyl alcohol, preferably 70% or greater. How I made the darts in this video:    • Make Ninja Darts for the Lighter Mini Cannon   How to make a mini cannon from a lighter (another mini airsoft cannon):    • Make a Mini Cannon from a Lighter   How to make water bottle rockets:    • Turn Empty Water Bottles Into Alcohol Fuel...   Thanks for watching! Be sure to subscribe, and leave me some feedback! -Ben #NightHawkInLight ~-~~-~~~-~~-~ Check out my latest video: "How To View Invisible Air Currents With Lasers"    • How To See Invisible Air Currents With Las...   ~-~~-~~~-~~-~