Glock G19/26 Gen5 9mm Luger 15 Round Factory Pistol Magazine Flat Dark Earth 1 Pack 15. Factory Glock magazines have a hardened steel insert encased in high tech polymer. This polymer coating protects the magazine and prevents deformation even when dropped from a great height. Note: Glock magazines can be very difficult to load when new. Often the last round will not fit until the magazine has undergone a break-in period. It is recommended that the magazine be loaded with all but the last round and left for a few days to compress the spring. Cycling the magazine from full to empty multiple times can assist in the break-in period. Specifications for Glock G19/26 Gen5 9mm Luger 15 Round Factory Pistol Magazine: Manufacturer: Glock Gun Make: Glock Gun Model: Glock 19 Gen 5 Glock 26 Gen 5 Caliber: 9mm Luger Magazine Capacity: 15 Round Fabric/Material: Polymer Package Contents: Glock G19/26 Gen5 9mm Luger 15 Round Factory Pistol Magazine What firearm models does the manufacturer say Glock G19/26 Gen5 9mm Luger 15 Round Factory Pistol Magazine is compatible with? The manufacturer suggests that Glock G19/26 Gen5 9mm Luger 15 Round Factory Pistol Magazine is compatible with Glock 26 Gen 5 Glock 19 Gen 5Glock 47461: G19/26 Gen5 9mm Luger 15 Round Factory Pistol Magazine Flat Dark Earth 1 Pack 15