The Beretta PX4 Storm is a DA/SA semi-automatic pistol chambered in .40 S&W with a 14+1 capacity. Its rotating barrel design differs from the tilting-barrel system used by most semi-autos, with Beretta claiming reduced felt recoil as a result of the barrel rotating in line with the bore axis during cycling. The polymer frame with interchangeable backstrap and Bruniton steel slide keep the package at 27.7 oz. 
 

Key Specifications 

• Brand: Beretta 
• Model: Px4 Storm 
• Caliber: .40 S&W 
• Capacity: 14+1 rounds 
• Barrel Length: 4 inches 
• Weight: 1.7 lbs (27.7 oz) 
• Finish: Black Bruniton Steel Slide with Polymer Frame 
• Action Type: Double/Single Action 
   

Detailed Features 

 
The DA/SA system provides a long first-shot pull from double action, then transitions to single action for follow-up shots. The interchangeable backstrap adjusts grip size for different hand fits. 3-dot white sights give a clear sight picture across lighting conditions. Ambidextrous safety works for both right- and left-handed shooters. The rotating barrel is the mechanically distinctive element here, intended to keep the barrel more consistently aligned during firing.

The Beretta PX4 Storm in .40 S&W draws reasonably consistent positive feedback.

Ergonomics lead the praise. The grip shape, texture, and overall hand fit are described as comfortable and natural, and most owners find the controls easy to reach and operate. Reliability across different .40 S&W loads gets consistent positive marks.

Accuracy is rated well, and most shooters feel confident hitting targets at typical pistol distances. The rotating barrel system is a point of interest; those familiar with the mechanics appreciate it, while others find the added mechanical complexity unnecessary.

Weight is occasionally mentioned as a concern for carry use. At 27.7 oz with a loaded magazine, some buyers prefer lighter polymer-framed alternatives for all-day carry.

Magazine capacity is the recurring complaint. 14+1 in .40 S&W is on the lower end compared to some competitors, and users who want more capacity point to that gap. Note: the product name in some listings references 15 rounds, but the listed specification is 14+1.

The PX4 Storm is generally regarded as a solid, reliable pistol with thoughtful ergonomic design, a rotating barrel worth understanding before purchase, and competitive pricing.