Beretta Factory PX4 Extended Magazine .40 S&W Black Steel 17/rd

The Beretta Factory PX4 Extended Magazine .40 S&W Black Steel 17/rd provides a significant capacity advantage for duty officers and civilian shooters who rely on the Px4 Storm platform. Moving beyond standard flush-fit capacities, this 17-round extended magazine ensures you have the necessary firepower for high-stress engagements or extended range sessions. Whether you are searching for a reliable secondary magazine for professional use or a primary for home defense, this factory-original component maintains the specific geometry required for flawless feeding. It bridges the gap between concealment and performance by offering the maximum round count available for the .40 caliber variant of this rotary-barrel handgun.

Constructed from heat-treated carbon steel, the Beretta Factory PX4 Extended Magazine .40 S&W Black Steel 17/rd features a friction-reducing black finish that facilitates smooth insertion and rapid extraction from magazine pouches. The internal spring is engineered to maintain consistent upward pressure, ensuring that even the final round is chambered with the same reliability as the first. A durable polymer baseplate extension provides the additional internal volume needed for the increased capacity while offering a tactile grip surface for positive reloads. The witness holes on the rear of the magazine body allow for immediate visual confirmation of your remaining ammunition during a lull in the action.

This magazine is designed specifically for the Beretta Px4 Storm series chambered in .40 S&W, including the Full Size and Compact models where the grip length allows for the extension. Professional users will appreciate the factory-spec tolerances that prevent the common feeding issues often associated with aftermarket extended options. Installation is straightforward as a direct drop-in replacement, requiring no modifications to the firearm's magwell or release mechanism. For those looking to buy a performance-tested solution for their duty sidearm, this magazine represents the gold standard in reliability and increased round count.