This sound crazy, but a lot of fun. See what's needed to build your own Gatling launcher.
This inventor built a six-shot arrow launcher from scratch, and he’s really really happy about it.
The internet is truly magical place. Where else can you find a detailed walkthrough on how to make an air-powered, arrow-launching gatling gun (sort of) with little more than a few valves, an empty six pack of Coca-Cola bottles, some wood, and a bike pump.