KRISS S-VECTOR

Type	Submachine gun
Place of origin	United States

Designed	2006
Manufacturer	KRISS USA, Inc., formerly Transformational Defense Industries
Produced	2009-present

Weight	5.6 lb (2.5 kg)
Length	24.3 in (620 mm) 16 in (410 mm) w/stock folded
Barrel length	5.5 in (140 mm)

Cartridge	.45 ACP , .40 S&W, 9x19mm Parabellum
Action	Delayed Blowback, closed bolt
Rate of fire	SMG: 1100-1200 rounds per minute Civilian models: semi-auto only
Effective range	~100 m
Feed system	13-round detachable box magazine 30 rounds w/optional extension
Sights	Flip-up iron MIL-STD-1913 rail provided for optics

The KRISS Vector series is a family of NFA and non-NFA weapons based upon the parent submachine gun design developed by KRISS USA. KRISS USA is formerly known as Transformational Defense Industries (TDI). The KRISS VECTOR is unique in that it utilizes an asymmetrical recoil and in-line design to reduce recoil and muzzle climb. The Vector's action was originally developed by French engineer Renaud Kerbrat. This action, the so-called Kriss Super V, is an articulated mechanism which allows the block and bolt to recoil not just rearward like most other firearms, but back and then 'vectored' down off-axis along a rail system behind the weapon's magazine well. The Vector family of weapons is the first to use this action; the company claims the .45 ACP chambering was chosen to demonstrate that the action could "tame" such a powerful round. Variants chambered for the .40 S&W and 9x19mm Parabellum round are currently in development. All KRISS Vectors operate with standard Glock magazines with the .45 ACP caliber weapons using the 13 round G-21 magazine.
The Vector's barrel is in line with the shooter's shoulder as in the M16 rifle and German FG42, but also in line with the shooter's hand as with many target pistols. Combined, these factors reduce felt recoil and muzzle climb by eliminating the distance between the shooter's hand and the bore axis along with the action of the Super V Mechanism.