The Kriss Vector is a series of weapons all based on the parent submachine gun developed by American firearms and defense company, Kriss USA. Originally designed in 2006, the Kriss Vector has an articulated mechanism known as the “Kriss Super V” that allows the bolt to move down behind the magazine well. In theory, the energy moves downward instead of rearward resulting in less felt recoil. This unconventional delayed blowback system in combination with in-line design reduces perceived recoil and muzzle climb. Used in select countries, Kriss has announced the development of several variants.