The MP5SD (Schalldampfer, silencer) features an integral suppressor that vents propellant gas through the barrel to reduce both sound signature and muzzle velocity. Type: Rifle Action: Semi-Automatic Caliber: 9mm Capacity: 30 Year introduced: 1974, Germany Weight: 89 oz Overall length: 30" Status: Active Military use: Yes Intended use: Special Operations, Law Enforcement