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 its 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
The Vector is confirmed to make an appearance in Black Ops II under the name "Vector K10"; it is similar to the Modern Warfare 2 counterpart, albeit with a black finish.

Trivia

 * In "Just Like Old Times," Soap uses a unique, all-black Vector with an ACOG scope and silencer. The same weapon can be seen on a Shadow Company soldier near the start of the mission. This vector cannot share ammo with a Vector taken from dead hostiles who drop regular, tan finish Vectors.
 * 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 pickup animation for the Vector shows its stock being unfolded.
 * 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.
 * When a suppressor is attached to this weapon, it appears slightly crooked in first-person.
 * Strangely, the brass casings on the cartridges inside the Vector's magazine are black.