Glock G17 & G34 OEM Gen5 9MM 10-Round Magazine Cardboard Style Packaging Black MGGL. The Glock Gen5 Magazine is compatible with previous Glock Gens. 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 G17 & G34 OEM Gen5 9MM 10-Round Magazine Cardboard Style Packaging: Manufacturer: Glock Gun Make: Glock Gun Model: Glock 34 Glock 17 Caliber: 9mm Luger Magazine Capacity: 10 Round Color: Black Fabric/Material: Polymer Package Contents: Glock G17 & G34 OEM Gen5 9MM 10-Round Magazine Cardboard Style Packaging What firearm models does the manufacturer say Glock G17 & G34 OEM Gen5 9MM 10-Round Magazine Cardboard Style Packaging is compatible with? The manufacturer says that Glock G17 & G34 OEM Gen5 9MM 10-Round Magazine Cardboard Style Packaging is compatible with Glock 17 Glock 34Glock MGGL47290: G17 & G34 OEM Gen5 9MM 10-Round Magazine Cardboard Style Packaging Black