KCI USA Glock 21/21SF/30/30SF/36/41 Pistol Magazine .45 ACP 26 Round Black 1 Pack Hardened Steel/Polymer 26RD. The polymer molding helps to protect the magazine body from damage and deformation from regular use. Specifications for KCI USA Glock 21/21SF/30/30SF/36/41 .45 ACP 26 Round Pistol Magazine: Manufacturer: KCI USA Gun Make: Glock Caliber: .45 ACP Magazine Capacity: 26 Round Color: Black Condition: New Fabric/Material: Polymer Package Contents: KCI USA Glock 21/21SF/30/30SF/36/41 .45 ACP 26 Round Pistol Magazine KCI USA KCI-MZ013-26RD: Glock 21/21SF/30/30SF/36/41 Pistol Magazine .45 ACP 26 Round Black 1 Pack Hardened Steel/Polymer