Heckler and Koch MP5K
Hk mp5ka4
Heckler and Koch MP5K
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Personal Status
The German Heckler & Koch MP5K is the shortened variant of the MP5. It is a 9mm submachine gun that uses a roller-lock delay system similar to the Heckler and Koch G3 rifle. Its standard capacity magazine size is 30 rounds but smaller magazines can be fitted for easier concealment.

It is used by Italian NOCS and German GSG-9 units as well as other counter-terrorist units. The one seen in Gunslinger Girl is concealed in a suit case where the trigger is connected to wires that reach the case's handle thus allowing the weapon to be fired without removing it from the case. Also was seen being used be Claes during training.