The SDP (Special Duty Pistol) is the short-barreled pistol variant of the Vector Gen II with a 5.5-inch barrel and brace-ready rear, popular for home defense and competition builds. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 17 Year introduced: 2015, USA Weight: 72 oz Overall length: 16.5" Status: Active Intended use: Home Defense, Competition, Pistol