Knight's Armament Personal Defense Weapon in proprietary 6x35mm caliber with 10-inch barrel, developed for USSOCOM PDW requirements. Type: Pistol Action: Semi-Auto Caliber: 6x35mm Capacity: 20 Year introduced: 2002, USA Weight: 72 oz Overall length: 22" Status: Limited Military use: Yes Intended use: Special operations PDW, vehicle crew