This is my Airsoft rocket launcher. I built it out of 4-inch diameter DWV-D drainpipe, held together with nothing but hot glue. It is approximately 4 and a half feet long, and weighs around ten pounds when empty. It fires shrapnel rockets, powered by D-class Estes model rocket engines. The rockets go about 200 feet, and are marginally accurate. I make my rockets out of soda bottles, and when they land, they blast a shower of BBs about fifteen feet in all directions, accompanied with a loud BANG. The rockets have a soft tip, so if they hit someone, they will not cause serious injury, no more than a bruise. I will post an Instructable for the rockets soon enough, once i get some disposable cash to make some more. This launcher is basically a more specialized version of Rwctt's launcher, with a store-bought ignition system and made of different materials. I do not have any construction pictures of the launcher, because at the time of construction, my camera was without a memory card. if you need instructions for something quite like this, go to the link below.
that is a regulation-size soccer ball (football for the rest of the world) for scale.
Rwctt's launcher provided the basic inspiration for this project, and his is just as good as mine.
You can find it here-----> http://www.instructables.com/id/PVC-Rocket-Launcher/