BERETTA PX4 STORM 4" .40 S&W

The Beretta PX4 Storm Full Size chambered in .40 S&W is a modern, polymer-framed, hammer-fired pistol known for its departure from Beretta’s traditional open-slide design. It was engineered to offer high durability and lower felt recoil in a package suitable for law enforcement and personal defense.

Key Design Elements

• Rotating Barrel System: Unlike most semi-automatics that use a tilting barrel (Browning action), the PX4 features a barrel that rotates on a central axis during the recoil cycle. This dissipates energy laterally and keeps the barrel in line with the bore, significantly reducing muzzle flip and felt recoil—a particularly helpful feature for the snappier .40 S&W round.

• Modular Ergonomics: The frame includes interchangeable backstraps (small, medium, and large), allowing the user to customize the grip size to their hand.

• Safety/Action Types: Most commonly found in Type F (Double/Single Action with an ambidextrous manual safety/decocker) or Type G (Double/Single Action with a decocker only).

• Ambidextrous Controls: It features a reversible magazine release and ambidextrous slide-mounted safety/decocker levers.

• Construction: The slide is treated with a Bruniton finish for corrosion resistance, while the frame is made of fiberglass-reinforced technopolymer with an integrated Picatinny rail for lights or lasers.

Technical Specifications