This is some serious James Bond ish. It starts off looking like a briefcase, but hidden inside is a Heckler & Koch MP5K. For those that don’t know the “K” designation is for the shorty version of the classic MP5 submachine gun. The gun weighs just 4.4-lbs, sports a tiny 4.5-inch barrel, and a total length of 12.8-inches. It can get through a 30-round magazine in just 2 seconds. Video of the briefcase MP5K after the break.