The HK SP5K is the ultra-compact variant corresponding to the MP5K, featuring a 4.53-inch barrel with a three-lug adapter for suppressor mounting. One of the most compact 9mm firearms available. Type: Pistol Action: Gas-Operated Caliber: 9mm Capacity: 30 Year introduced: 2019, Germany Weight: 4.6 oz Overall length: 13.9" Status: Active Military use: Yes Intended use: PDW, Collector, Tactical