Replacement or spare magazine for your .40 S&W Px4 Storm.
Also compatible with: CX4 with PX4 Magazine Well Insert/Magazine Release, PX4 Full Size .40S&W, PX4 Compact .40S&W, PX4 Sub-Compact .40S&W* (Will extend below the base of the grip on a Compact and Sub-Compact)
10 round capacity.
Caliber: .40 S&W.
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).