The TDI Vector 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.
In the single player the Vector is often found in use by enemies, most notably by the forces of the Ultranationalist Party, more specifically, the Spetsnaz, the Arctic forces, and Shadow Company. However, a unique Vector with an ACOG Scope, Suppressor, and a black finish can be used as a starting weapon in "Just Like Old Times".
The Vector has the highest rate of fire and lowest recoil of any SMG in the game. The Vector's damage per bullet is less than the other weapons found in the game. The Vector is generally considered to be the easiest SMG to use at long range given it's low recoil, allowing the user to fire off longer bursts, or even sustained fire at long range. Despite it's low damage, it excels in more open maps, where medium to long range combat is required. The Vector combines the long range of an assault rifle with the easy mobility, high fire rate, and small magazine of an SMG, blurring the line between the two weapon types. Despite these advantages, the Vector has some flaws. The small ammo count and magazine makes the user chew through ammo quite fast, and requires frequent reloading.
The TDI Vector has low damage but a high RPM, which makes the damage output quite consistent at all ranges. The ACR has a similar effect.
Because the Vector chews through ammo, Extended Magazines or the Scavenger Pro perk can be very helpful as this allows the player to continue getting more kills in a life, or allows the player to kill more enemies before needing to reload. Sleight of Hand is also effective if Scavenger Pro or Extended Mags aren't available, although the reserved ammo will still be used quickly. The Silencer can also be effective since the player would not lose much power even if a silencer is used as it will almost always kill in 5 shots without stopping power, or 4 shots with stopping power. ACOG and Thermal scopes add a small amount of recoil. A Red Dot Sight or Holographic Sight makes the Vector more effective for medium to long range shooting.
In Hardcore, the Vector's fast firing makes it very effective since it requires 2 shots to kill at any distance without Stopping Power, and 1 shot with Stopping Power at close range in normal circumstances.
With Rapid Fire applied, it is advisable to fire in short bursts.
Hate Vector, not enough damage, unless you are really close, and i dont know and dont like rushing, so thats a really bad weapon for me, thats why i prefer Mini Uyi with xmags...at least its a little middle/close range...but UMP45 beats em all xD