The SP5 was developed by Heckler & Koch as a semiautomatic, civilian sporting pistol that matches the look and feel of the legendary MP5 submachine gun.
Renamed the Lachmann Sub in Modern Warfare 2, the MP5 has long been one of the best guns in Call of Duty multiplayer, so it's worth knowing the best attachments to unlock for it. The MW2 MP5 is unlocked in the Gunsmith system as part of the Lachmann and Meer weapon platform.