Masterpiece Arms MPA DS9 9mm Luger 17 Round Pistol Magazine MQ. MasterPiece Arms Magazine 9MM 17 Rounds Fits MPA DS9 Black Specifications for Masterpiece Arms MPA DS9 9mm Luger 17 Round Pistol Magazine: Manufacturer: Masterpiece Arms Caliber: 9mm Luger Magazine Capacity: 17 Round Package Contents: Masterpiece Arms MPA DS9 9mm Luger 17 Round Pistol Magazine Masterpiece Arms MPA DS9 9mm Luger 17 Round Pistol Magazine MQRING351250