Upgrade your 2011, MAC 1911 Double Stack or similar pistol with this Checkmate manufactured 9mm 17-round magazine. Built for reliability, smooth feeding, and long-term durability, it's the perfect replacement or spare mag for range days, training, and defensive use. Key Features & Specs: Fits: Military Armament Corp and similar 1911 Double Stack, 2011 platforms Caliber: 9mm Capacity: 17 rounds Manufacturer: Checkmate Industries Base Plate: Durable polymer base pad Finish: Chrome for corrosion resistance and smooth insertion Use Case: Ideal as a reliable replacement or spare magazine