PX4 Sub-Compact pistol features, calibers and available configurations.

The Beretta Px4 Storm Sub-Compact pistol is the most advanced sub-compact sidearm of its kind. Built around Beretta’s latest Px4 modular technology, the Px4 Storm Sub-Compact delivers concealed carry handling with large frame firepower. Available in two calibers (9mm and .40 S&W), the Px4 Storm Sub-Compact uses a very reliable locked breech and tilt barrel system, providing a more compact and lighter weight system.
A stainless steel barrel requires less maintenance and is corrosion resistant, perfectly suited for concealment close to active, perspiring bodies.
The pistol adapts to different hand sizes easily with interchangeable backstraps (included). An ambidextrous manual safety lever is positioned on both sides of the slide for easy access by all shooters. A reversible magazine release button can be mounted on either side and can quickly be replaced by a smaller and larger size button (optional).
An interchangeable slide catch can also be replaced with an optional low profile configuration. A standard Picatinny Rail (MIL-STD-1913) allows for an array of aftermarket accessories.