KCI USA Double Stack Glock Pistol Magazine 9mm Luger 50 Round Black 1 Pack Polymer 50RD. The ratcheting load assist lever provides efficient and easy loading. This magazine is not designed to be used with hollow point ammo. For use in Glock patterned pistols. Compatible with Glock 17/17L/19/19x/26/34/45/47. Specifications for KCI USA Double Stack Glock 9mm Luger 50 Round Pistol Magazine: Manufacturer: KCI USA Gun Make: Glock Caliber: 9mm Luger Magazine Capacity: 50 Round Color: Black Fabric/Material: Polymer Package Contents: KCI USA Double Stack Glock 9mm Luger 50 Round Pistol Magazine KCI USA KCIMZ027-50RD: Double Stack Glock Pistol Magazine 9mm Luger 50 Round Black 1 Pack Polymer