DIY: Grappling hook gun turns common man into The Dark Knight

Are you looking for a new career path? Have you considered becoming a masked vigilante like Batman? All you need is a sizable trust fund, a tragic backstory, and an unending supply of high-tech gadgets. Sound impossible? Nothing is impossible if you have the right DIY skills. YouTuber The Hacksmith designed and created his own grappling hook gun complete with ascension winch. All that's missing are the costumed villains.