The last flagship invention of mad slingshot engineer Joerg Sprave was his first fully-automatic crossbow, which made use of a cordless drill and a clever geared mechanism for burst-fire bolt flinging ...

Mad slingshot genius Joerg Sprave has accomplished many things in his years of DIY weapons engineering. A rifled slingshot that shoots knives, an air-powered bazooka, a slingshot with an internal ...