Vector

The **TDI Vector**[4] series is a family of .45 ACP submachine guns developed by Transformational Defense Industries. They utilize asymmetrical recoil and in-line design to reduce recoil and muzzle climb. This operating system is called the **Kriss Super V**. "Kriss" refers to a Southeast Asian fighting dagger. Design TDI refers to the operating system as the **Kriss Super V**. The system claims to compensate for recoil by utilizing moving parts that travel down into a recess behind the magazine. This means they travel vertically and forces encountered when they reach the end of their travel act downward, reducing muzzle rise. The barrel is also in-line with the shooter's shoulder as in the M16 rifle and German FG42 but also in line with the shooter's hand. Combined, these factors are advertised to create less felt-recoil and muzzle climb. The diverted recoil operation has its roots dating back to the early 20th century when the Hamilton mod. 1901 pistol was invented.

edit] Variants
The fully automatic variant is marketed as the **Vector SMG**, and features a 5.5 inch barrel. TDI also produces two semi-automatic versions of the Vector for sale in the US[5] with the option of a fixed stock in states where a folding one would be prohibited. The semi-automatic carbine is called the **Vector CRB/SO**, with no confirmation on what the letters "CRB" stand for; they are presumed to mean "carbine." Similarly, the semi-automatic short-barrel version is labeled as **Vector SBR/SO**, presumed to stand for "Short BaRrel" or "Short Barrel Rifle." TDI has announced that they also plan on adapting the system for higher-power cartridges in the future, with the company's website including plans for a 12-gauge shotgun called the MVS, and an unnamed .50 BMG heavy machine gun[6].