Glock Magazine G21 45AP 10RD M211020-10RD

Glock Magazine G21 45AP 10RD M211020-10RD. 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 Magazine G21 45AP 10 Round: Manufacturer: Glock Gun Make: Glock Gun Model: Glock 21 Caliber: .45 ACP Magazine Capacity: 10 Round Finish: Black Condition: New Fabric/Material: Polymer Package Contents: Glock Magazine G21 45AP 10 Round What firearm models does the manufacturer say Glock Magazine G21 45AP 10 Round is compatible with? The manufacturer says that Glock Magazine G21 45AP 10 Round is compatible with Glock 21Glock M211020-10RD: Magazine G21 45AP 10RD