The Beretta PX4 Storm is a full-size semi-automatic pistol chambered in .40 S&W. It has a 4-inch barrel, 10+1 round capacity, and weighs 27.7 oz. (1.7 lbs.). The frame is polymer with a black finish; the slide is matte black Bruniton steel. 
 

Key Specifications 

• Model: Beretta PX4 Storm 
• Caliber: .40 S&W 
• Barrel Length: 4 inches 
• Capacity: 10+1 rounds 
• Weight: 27.7 oz (1.7 lbs) 
• Frame Material: Polymer with Black Finish 
• Action Type: Single/Double Action (SA/DA) 
• Safety Features: Ambidextrous safety and firing pin block 
   

Detailed Features 

The PX4 Storm uses a rotary barrel system. As the barrel rotates during recoil rather than tilting, muzzle rise and felt recoil are reduced compared to a conventional tilting-barrel design, which helps with faster follow-up shots. The grip accepts interchangeable backstraps to fit different hand sizes. Three-dot white sights give a quick sight picture. The Bruniton steel slide resists corrosion. 
 

Usage 

The 4-inch barrel and SA/DA action make this a capable home defense option. The manageable recoil is useful for shooters who want to build skill without fatigue. It works on competition stages where accuracy at typical defensive distances is the task, and the interchangeable grips make it a practical training pistol for a range of shooter sizes.

PX4 Storm owners in .40 S&W tend to land in a few camps.

The most consistent praise is for the rotary barrel's recoil mitigation. Shooters who've handled other .40 S&W pistols often note the PX4 rides noticeably flatter, which they credit to the rotating barrel. Reliability comes up often too — the gun runs a wide variety of .40 S&W loads without fuss. Accuracy at typical defensive distances is well-regarded, and the ergonomics, particularly the natural grip angle and interchangeable backstraps, draw frequent mentions.

The criticisms are fairly predictable. The pistol is full-size, and some owners find it too bulky for carry use. At 27.7 oz. it isn't heavy for its class, but the overall dimensions put off anyone looking for a compact option. The 10-round capacity is a sore point for those who compare it to higher-capacity .40 S&W pistols. The trigger gets mixed reviews — the DA first pull is long and heavy, which is normal for the action type but still draws complaints from shooters expecting something lighter. A few owners also mention the aesthetics as purely functional rather than distinctive, which matters or doesn't depending on the buyer.