Replacement or spare magazine for your 9 mm Px4 Storm, 10 capacity Caliber: 9mm. Finish: Black
Also compatible with: CX4 with PX4 Magazine Well Insert/Magazine Release, PX4 Full Size 9MM, PX4 Compact 9MM, PX4 Sub-Compact 9MM* (Will extend below the base of the grip on a Compact and Sub-Compact)

If you are purchasing this  magazine for a CX4 Carbine, please ensure that your pistol has a compatible adapter. If you are unsure, you can check it online by visiting www.berettasupport.com. Choose “Technical Data Search” on the right side of the screen. Enter your serial number. The resulting data will include whether or not your CX4 is fitted with a 92FS or PX4 adapter (ie Product Description: CX4 STORM (PX4) 9MM/17RD).