This is V3 of the rocket meant for the wrist mounted launcher

This is a version of the rocket featured here: http://www.thingiverse.com/thing:65447

The wrist mounted launcher is here: http://www.thingiverse.com/thing:69172

This rocket fits into the tubes without any wobble and should exit straighter and so fly better. I include the STL to have it print in one piece or 2 pieces in case you want to adjust the CG by adding nose weight or add a streamer.

Update 12/11/2013: The rockets are so light they will tumble-recover just fine. If you prefer, put in a streamer, but I would drill a small hole to put in a piece of kevlar cord, a short piece of shock cord and a streamer. A hole in the nosecone will do fine.

I will shortly be adding an STL for an adapter to mount to a standard model rocket tripod launcher so that you can cant the launcher body upwards. Because the rockets are so light and will not travel far and will tumble down or come down with a streamer, you won't have to run far to get them back. Just keep in mind to point into the wind -- the rockets won't go more then a few hundred feet. MOST IMPORTANT OF ALL DO NOT launch these horizontally. There is a good chance they could tumble and hurt you or others depending on how they printed. Better they tumble at altitude rather than at head height. At least you'll have a chance to avoid it then. Don't forget that an engine like an A3-4T could burn or blow this thing up when the ejection charge fires. If you want to tumble recover, use a booster stage engine instead. Again, far better this happens far above and away from you than down on the ground near you and your loved ones watching the action. BTW, the fit of the rockets here (1 is using a surplus model rocket nosecone) is EXCELLENT and there is little to no wobble in the tube(s).