The Gyrojet doesn’t look like much, but it’s basically a handheld mini rocket launcher. Feel bad for judging it by its size now? Yeah, it gets that a lot. Instead of relying on gunpowder, the Gyrojet is basically a vessel for independtly-powered rocket bullets–maybe you’ve seen it in You Only Live Twice? Yeah, that thing’s real! Hilariously, though, if someone pulls one of these on you, you can just stick your finger in the barrel to stop it–it needs time to build up significant speed.