KCI USA Glock 17/26/19 Extended Pistol Magazine 9mm Luger 33 Round Black 1 Pack Polymer 33RD. The polymer molding helps to protect the magazine body from damage and deformation from regular use. Compatible with Glock 17/17L/19/19x/26/34/45/47. Specifications for KCI USA Glock 17/26/19 9mm Luger 33 Round Extended Pistol Magazine: Manufacturer: KCI USA Gun Make: Glock Caliber: 9mm Luger Magazine Capacity: 33 Round Color: Black Fabric/Material: Polymer Package Contents: KCI USA Glock 17/26/19 9mm Luger 33 Round Extended Pistol Magazine KCI USA KCIMZ008-33RD: Glock 17/26/19 Extended Pistol Magazine 9mm Luger 33 Round Black 1 Pack Polymer