MP5K

The MP5k is an SMG featured in Call of Duty: Modern Warfare 2. The MP5k is the 'kurz' (short) version of the MP5, featuring a shorter barrel and no stock. As a result it has a higher ROF, though it is harder to control. An updated version, the MP5k-PDW, is designed to fix these issues by adding a folding-stock for controllability, and is said to have the same accuracy as the full-length MP5.

In Game
It was first seen used in the World-wide reveal trailer by the Russian S.W.A.T. teams. In Single-Player, it has been seen used by the Brazilian Militia in Takedown. The version shown is externally modified with picatinny rails to more easily mount attachments. Also, it is noticeably smaller than the MP5, but it is unknown how this will affect it in game.