One man showed millions of people how to convert an AR-15 so that it can fire 70,000 rounds in a minute. All Andy Orlando used was a mil-spec butter knife, and he “converted” a handgun and rifle into automatic weapons in less than five minutes. He got the rifle to a sustained rate of fire of 70,000 rounds per minute, and the handgun to a rate of 2,000 rounds per minute. Absolutely incredible accomplishment. I don’t want to give any of his secrets away, so go ahead and watch the video.