The Puntgun, World's Largest Shotgun. Oct 31, 2008 19:56:22 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by mortensen on Oct 31, 2008 19:56:22 GMT -5 Worlds Largest Shotgun (Puntgun).You'll see the picture of the worlds largest shotgun and scroll down a little and click onto the video and see it fired.www.techeblog.com/index.php/tech-gadget/feature-world-s-largest-shotgun-with-video-demonstration-