HK's SP5K is a semi-automatic, civilian sporting pistol that matches the look and feel of the famous MP5K submachine gun. Its design meets the definition of a civilian pistol and marks the return of the roller delayed blowback system. The operating system is legendary in its accuracy and reliability. For more comfortable shooting, the SP5K is equipped with an elastic bungee sling. The sling is easily installed by snapping it onto the sling swivel hardware located on the rear of the receiver. The SP5K comes with two 30-round magazines.