Kahr X9 Double Stack 9mm Pistol, 3.54-Inch, Used The Kahr X9 Double Stack is a used 9mm pistol with a 3.54-inch barrel and a stated 10-round magazine capacity. Two 10-round magazines are included, so the magazine quantity and capacity are both defined. The double-stack designation identifies the magazine layout of the X9. The barrel length and capacity remain separate specifications for choosing this used firearm. Key Features Used firearm: Used condition preserved. Barrel length: 3.54 inches. Capacity: 10 rounds. Specifications Brand/model: Kahr X9 Double Stack Condition: Used Chambering: 9mm Barrel: 3.54 inches Capacity: 10 rounds Package Contents Used Kahr X9 Double Stack pistol 2 10-round magazines Shop the Kahr X9 Double Stack 9mm Pistol, 3.54-Inch, Used at BattleHawk Armory.