I thought of this when watching the new years video where Jorge shoot fire works out of a sling shot my idea is almost the same principle, but for taking down "heavy armored targets". So anyway you can buy or build model rockets that use solid fuel engines that fly a good distance with loads of power. Just shooting the rockets up is fun, but what if you took a steel tipped model rocket and launched it from a sling shot. You could launch the rockets by linking the ignition system button was up to the sling shot release. There are some factors you would have to think about such as the weigh of the rocket causing it to nose dive into the ground. Also take note where you shoot them they fly FAR AND HIT HARD! P.s Theirs a back blast of rocket thrust to pop the parachute out of the rocket so maybe you could fill the rockets with gun powder so they explode eventually.