The MP5SD (Schalldampfer) features an integral suppressor that bleeds propellant gas from the barrel, subsonic-izing standard-velocity 9mm ammunition without requiring subsonic loads, the only production platform to achieve this. Type: Semi-Auto Rifle Action: Roller-Delayed Blowback Caliber: 9mm Capacity: 30 Year introduced: 1974, Germany Weight: 7.06 oz Overall length: 33.3" Status: Active Military use: Yes Intended use: Military, Law Enforcement, Suppressor Host