KCI USA Gen 2 Glock 23/27 Pistol Magazine .40 S&W 13 Round Black 1 Pack Hardened Steel/Polymer 13RD. The polymer molding helps to protect the magazine body from damage and deformation from regular use. Specifications for KCI USA Gen 2 Glock 23/27 .40 S&W 13 Round Pistol Magazine: Manufacturer: KCI USA Gun Make: Glock Caliber: .40 S&W Magazine Capacity: 13 Round Color: Black Fabric/Material: Polymer Package Contents: KCI USA Gen 2 Glock 23/27 .40 S&W 13 Round Pistol Magazine KCI USA KCI-MZ011-13RD: Gen 2 Glock 23/27 Pistol Magazine .40 S&W 13 Round Black 1 Pack Hardened Steel/Polymer