Striker

The Armsel Striker is a semi-automatic shotgun featured in Call of Duty: Modern Warfare 2.

History
The Striker was designed in Rhodesia and produced in South Africa, finding its way across the world but mainly used by the Chinese Army. Unlike most shotgun designs, the Striker uses a revolving 12-round drum magazine. The shotgun is useful for riot control and combat due to its small size, semi-automatic capability, and high capacity, though slow to reload due to its design.

Call of Duty: Modern Warfare 2
The Striker is unlocked at Level 34 of Call of Duty: Modern Warfare 2's multiplayer mode. It appears to have a much higher ammo capacity than any other shotgun, holding 12 shells in its drum magazine. Like the M1014, it fires in a semi automatic fashion. The Ultranationalists use it as their primary shotgun, though the actual primary shotgun of the Russian military is the AK-47 based Saiga-12 automatic shotgun.

Multiplayer
The Striker is great for short range combat, if used correctly. It needs its rather large 12 shell magazine because it rarely kills with one shot at even the slightest distance. Fire two or even three shots in a rhythm timed to overcome recoil to guarantee a kill. The Grip can help to speed up this rhythm. Rather surprisingly, Stopping Power works well with the Striker, essentially giving it more "range" as the few pellets that hit at larger distances will do more damage.

The main disadvantage of the Striker is the very long reload. Each shell is loaded by hand and the cylinder is wound for each shell, so the length of the reload is dependent on how empty the weapon is. Reloading all twelve shells takes an inordinately long time. Pressing fire while reloading waits for one more shell to load then cancels and does not fire until fire is pressed again so switching weapons or sprinting are quicker, more effective ways of cancelling a reload. The long reload can be mitigated somewhat by Sleight of Hand.

Spec-Ops
The Striker is a very useful weapon in Special Ops, due to it's ability to kill most enemies in one shot, as well it's large ammo capacity. It is highly recommended for the multiplayer map Estate, and inside the airplane on Terminal.

Trivia

 * The model used in-game isn't the actual Armsel Striker, but the Armsel Protecta, as the Striker has a stock, and the Protecta doesn't.
 * The model of the Striker, was based on the model of the MG42 from the previous game.

Video
http://www.youtube.com/watch?v=8lRToMErJmY