Already producible at home by people with fabrication skills. Heck, a wooden or plastic crank could be built with tools most people have in their houses alrea

Already producible at home by people with fabrication skills. Heck, a wooden or plastic crank could be built with tools most people have in their houses already. Also, 'bump stocks' aren't strictly necessary. Applying forward pressure with your stabilizing hand on a rifle as you fire can cause it to bump.