PPSh-41

The PPSh-41, nicknamed the "Papasha" or "burp gun", or in Russian either "Pistolet-Pulemet Shpagina", or "Пистолет-пулемёт Шпагина" is a submachine gun that was used by the Soviet Union during World War II.

History
The PPSh-41 was designed by Georgii Shpagin as the less expensive gun to the PPD-40 which was more costly and harder to build. The PPSh-41 was first used in the Winter War and later used during World War II against the German soldiers and afterwards by other Communist countries. There were several instances of Germans using captured PPSh-41s in battle; some German armorers even rechambered the weapon to 9mm Parabellum and altered them to accept MP40 magazines.

Call of Duty 1 and United Offensive
The PPSh-41 has an enormous 71-round magazine. It's recoil is pretty controllable, making it a great weapon to use indoors and outdoors. Some people have deemed this weapon "cheap", so use it with caution. You can even hip-fire it with good results, so don't worry about having to switch to ironsights every time you want to use it.

It can be switched between semiauto and automatic firing modes, but there's no point in switching to semiauto when auto's recoil is very controllable.

Call of Duty 2
The PPSh has received a large overhaul for the worse. It's recoil is less controllable than it was before, making it much less deadly than it was. It can only be easily used indoors. To the dismay of two or so people, it can't be used in semiauto mode anymore.

Call of Duty: World at War
The PPSh is unlocked at level 53.

Video
Call of Duty 2 PPSh gameplay xvPHpwOsPzY=18!

Trivia

 * Although the PPSh is almost always depicted in games and movies exclusively using 71-round drum magazines, Soviet troops usually carried only one drum magazine - which they would load in the weapon at the start of an engagement and discard once it was depleted - and several box magazines.