“The Bow-Mag by Rac-Em-Bac is a cutting edge arrowhead casing that allows the hunter to place a .38 or .357 Magnum round inside. Simply secure your ammunition in the Bow-Mag cylinder and turn until the casing threads lock in place. Secure the loaded Bow-Mag to your standard arrowshaft as you normally would. Once your arrow hits the intended target, the Bow-Mag firing pin hits the bullet, delivering its deadly payload.”
Not totally sure if this is legal, ethical or effective. But it does fire arrow- or bolt-powered bullets, so that’s that.