Vector

The Vector is a Submachine Gun featured in Call of Duty: Modern Warfare 2 and Call of Duty: Black Ops II.

Campaign
In the campaign, 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 is used as a starting weapon in "Just Like Old Times", along with an Intervention w/ suppressor.

Multiplayer
The Vector has the highest rate of fire and lowest recoil of any SMG in the game. The Vector deals the lowest damage per shot than any other weapon found in the game. The Vector is generally considered to be the one of the easiest SMGs to use at long range given it's low recoil. Despite its SMG status, it excels in more open maps, where medium to long range combat is required. The Vector combines the long range accuracy of an assault rifle with the high mobility, fire rate, and hipfire accuracy of an SMG, blurring the line between the two weapon types.

Despite these advantages, the Vector has some flaws. Because the Vector chews through ammo due to its high rate of fire, Extended Magazines or the Scavenger Pro perk can be very helpful as this allows the player to continue achieving more kills in a life, or allows the player to kill more enemies before needing to reload. Bear in mind that the Extended Magazines will not increase the player's total ammo but only rounds per magazine. 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 five shots without Stopping Power, or four shots with it.

In Hardcore, the Vector's high rate of fire makes it a very deadly weapon, since it requires two shots to kill at any distance without Stopping Power, and one shot with Stopping Power at close range in normal circumstances.

Weapon Attachments

 * Rapid Fire
 * Akimbo
 * Red Dot Sight
 * Holographic Sight
 * Silencer
 * ACOG Scope
 * Thermal Scope
 * FMJ
 * Extended Mags

Call of Duty: Modern Warfare 3
The Vector was seen in some early trailers of Call of Duty: Modern Warfare 3. Its successor appears to be the PP90M1, as both share a similar high rate of fire and low recoil.

Call of Duty: Black Ops II
"Fully automatic submachine gun. Contains recoil mitigation technology."

- Description.

The Vector K10 is confirmed to appear in Call of Duty: Black Ops II. It is very similar to the Vector from Call of Duty: Modern Warfare 2 since it shares the same animations and uses a similar model, the only notable difference is the Vector K10 now holds 36 rounds rather than it's original 30.

Trivia

 * The words "Infinity Ward, Encino CA" are etched into the back of the weapon.
 * The orange color in fall camouflage for the Vector is slightly darker because the light grey in the texture files is slightly darker.
 * The player's hand model goes through the Vector's magazine housing. While this error can't be seen normally, it can clearly be seen while reloading and spinning to the left with a high sensitivity.
 * Strangely, the brass casings on the cartridges inside the Vector's magazine are black.