The KRISS Vector series is a family of weapons based upon the parent submachine gun design developed by KRISS USA, formerly Transformational Defense Industries (TDI). They use an unconventional delayed blowback system combined with in-line design to reduce perceived recoil and muzzle climb.
History
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The second generation prototype of the KRISS Vector called the K10 was announced at SHOT Show 2011. It is a slightly more compact version of the Vector that is based on the same Super V system. The main difference is the use of a telescopic stock that collapses into the upper receiver rather than the earlier folding stock. The charging handle operates downward instead of horizontally. The K10 was not displayed after SHOT Show 2013 and its status is unknown and likely have been cancelled.
KRISS announced the "Gen II" versions of the original Vector models in 2015. It features a redesigned pistol grip, safety selector, and compatibility with a new 9mm lower were announced. It appears to have replaced the K10 prototypes.
Design
The KRISS Vector uses the KRISS Super V Recoil Mitigation System, that is an articulated mechanism which allows the bolt and an inertia block to move downward into a recess behind the magazine well.[8] The theory is that at the end of this travel, the energy is transmitted downward rather than rearward, thus reducing the felt recoil. When fired, the barrel axis is in line with the shoulder as in the M16 rifle, but also in line with the shooter's hand. This is intended to reduce muzzle climb when combined with the off-axis bolt travel, though it also greatly raises the sight line in comparison to the bore axis. The initial prototype model by TDI achieved a rate of fire of 1,500 rounds per minute (RPM), though this was bought down to around 1,200 rounds per minute (RPM) on the production models.
In a similar manner to the AR-15 rifle, that is secured together with four push pins; the KRISS Vector is split into two major assemblies. Due to the weapon's unusual layout, the lower contains the action, charging handle, magazine well and barrel, while the upper contains the ejection port, rail system, pistol grip and fire control components, as well as the stock for configurations that have one. This modular design allows for toolless caliber conversions by swapping out only the lower. The Vector's safety is ambidextrous (as well as the fire mode selector on the auto trigger pack) while the ejection port, charging handle, bolt release catch and magazine release are not, and are only available in a right-handed configuration.
Calibers such as .22 LR, .40 S&W and 9×19mm Parabellum were mentioned when the gun was first released. The Gen II versions with multiple design changes including a new 9 mm variant were confirmed at SHOT Show 2015,[9] though the .22LR version has yet to materialize and likely have been cancelled. The original Vector was designed to accept standard Glock 21 pistol magazines; a special "MagEx 30" kit was available to convert a factory 13-round .45 ACP Glock magazine to an extended high-capacity version, though this is now marketed as a "25+" round kit.The newer 9×19mm Parabellum versions instead uses the standard Glock 17 magazines.
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