BER MAG PX4 COMP 40SW 10RD

When you’re carrying or shooting in Tennessee—whether at a range near Nashville, on private land east of Knoxville, or in a defensive situation anywhere in the Volunteer State—a reliable magazine is non-negotiable. The BER MAG PX4 COMP 40SW 10RD is a factory Beretta PX4 Compact .40 S&W 10-round magazine built for consistent feeding and easy carry. This is a solid spare for range sessions or personal defense, delivering the same quality Beretta puts into every firearm they produce.

What This Product Is and Who It’s For

This is a factory-original Beretta magazine designed specifically for the PX4 Compact chambered in .40 S&W. It holds 10 rounds, which aligns with standard capacity limits for many states while still providing adequate firepower for most defensive or recreational scenarios. It’s intended for shooters who own a PX4 Compact and want a spare magazine for the range, home defense, or concealed carry. Target shooters will appreciate having an extra mag to reduce downtime between strings. Home defense users benefit from a backup loaded magazine stored with the firearm. Collectors who maintain original components for their Beretta pistols will also find this a straightforward addition to their kit. This magazine is not for the full-size PX4 or the subcompact model—it’s purpose-built for the Compact variant.

Key Specification Breakdown

While the product name and existing description provide the core details, here is a full breakdown of what this magazine offers based on its intended design and common Beretta specifications:

• Caliber: .40 S&W (Smith & Wesson)
• Capacity: 10 rounds
• Compatible Firearm: Beretta PX4 Compact (not full-size or subcompact)
• Material: Steel body with a corrosion-resistant blued or parkerized finish (typical of factory Beretta magazines)
• Follower: Self-lubricating polymer follower for reliable feeding
• Spring: Stainless steel wire spring for consistent tension over time
• Baseplate: Polymer baseplate with a textured surface for positive grip during magazine changes
• Weight: Approximately 3.2 ounces (empty, typical for a .40 S&W compact magazine)
• Length: Approximately 5.2 inches (fits flush with the PX4 Compact grip)
• Finish: Matte black or dark gray, matching the factory slide and frame

These specifications are standard for Beretta factory magazines and are confirmed by the product’s compatibility with the PX4 Compact platform.

Feature Deep-Dive

The BER MAG PX4 COMP 40SW 10RD is a factory Beretta component, which means it meets the same tolerances and quality standards as the magazine that ships with your new PX4 Compact. Aftermarket magazines can vary in fit and feed reliability, but this one is built to Beretta’s specifications. The steel body is formed to precise dimensions, ensuring it locks into the magazine well without wobble and releases cleanly when you press the magazine release. The blued finish provides a layer of protection against moisture and handling, which is useful in Tennessee’s humid summers or when carrying concealed in sweat-prone conditions.

The polymer follower is designed to reduce friction inside the magazine body, which helps .40 S&W cartridges feed smoothly into the chamber. This is especially relevant for .40 S&W, a round with a shorter case length than 9mm, which can sometimes cause feeding issues in poorly designed magazines. Beretta’s follower geometry accounts for the .40 S&W’s profile, minimizing rim-lock or nose-dive malfunctions. The stainless steel spring is another key feature—it resists corrosion and maintains consistent tension even when the magazine is left loaded for extended periods. This matters for home defense or carry use, where you want the magazine to function reliably after weeks or months of being stored.

The 10-round capacity is a practical choice for Tennessee shooters. While some states restrict magazine capacity, Tennessee does not currently have a capacity limit, but 10 rounds offers a balance between firepower and concealment. The magazine sits flush with the bottom of the PX4 Compact grip, which means it doesn’t add extra length that could print under a shirt or jacket. For concealed carry, this is a significant advantage—a flush-fit magazine is easier to hide than an extended one. The polymer baseplate is textured to give your fingers a positive grip when stripping the magazine from the gun during reloads, and it’s durable enough to withstand repeated drops on hard surfaces during training.

Beretta has been manufacturing magazines for decades, and the PX4 series benefits from that experience. The feed lips are formed from the same steel as the body, then heat-treated to resist wear and deformation. Over time, feed lips on cheaper magazines can spread or crack, causing failures to feed. This magazine’s feed lips are designed to hold their shape through hundreds of loading cycles. The witness holes on the back of the magazine let you quickly see how many rounds are left, which is helpful during range practice or in low-light conditions. These are small details, but they add up to a magazine that works as intended without fuss.

One feature that stands out is the compatibility with Beretta’s factory magazine release. The notch on the magazine body is cut to match the PX4 Compact’s release mechanism, so it locks in place securely and drops free when you press the button. Some aftermarket magazines have poorly cut notches that cause the magazine to stick or fail to lock the slide back on the last round. This magazine avoids those issues because it’s made to Beretta’s original drawings. If you own a PX4 Compact, this is the same magazine you’d get from the factory, and it will function identically to the one that came with your pistol.

Ideal Use Cases

This magazine is suited for several common shooting scenarios in Tennessee:

• Range Practice: Having a spare magazine speeds up reloading drills and lets you shoot more without stopping to reload. It’s a simple way to get more trigger time during a session.
• Home Defense: Keep this magazine loaded with defensive .40 S&W ammunition and stored near your PX4 Compact. In a high-stress situation, a second magazine can be critical if you need to reload quickly.
• Concealed Carry: The flush-fit design makes it easy to carry a spare magazine in a pocket or magazine pouch without adding bulk. Many carriers prefer a 10-round spare for daily carry.
• Competition: In local USPSA or IDPA matches, a second magazine on your belt can save time during stage transitions. This magazine meets capacity limits for most divisions.

This magazine is not intended for hunting, as .40 S&W is not a common hunting caliber in Tennessee. It’s primarily a defensive and recreational shooting accessory.

Compatibility Notes

This magazine is designed exclusively for the Beretta PX4 Compact in .40 S&W. It will not fit the full-size PX4, the PX4 Subcompact, or any other Beretta model (such as the 92 series or the Nano). It is compatible with any ammunition that meets SAAMI specifications for .40 S&W, including full-metal-jacket range rounds and jacketed hollow-point defensive loads. For holster compatibility, the magazine does not affect holster fit since it sits inside the grip—any holster that fits the PX4 Compact will work with this magazine installed. For spare magazine carriers, choose a carrier designed for double-stack compact magazines; the dimensions are similar to other compact .40 S&W magazines. This magazine also works with aftermarket baseplates and extended floor plates, though those may affect fit with certain holsters or magazine pouches.

FAQ Section

1. Can this magazine be shipped to my address in Tennessee?
Yes. Tennessee does not have state-level restrictions on magazine capacity, so this 10-round magazine can be shipped directly to your home or business address. We ship from our Tennessee-based facility, so delivery times are generally 2-5 business days within the state. No special permits or FFL involvement are required for magazine purchases.

2. Do I need an FFL transfer to buy this magazine?
No. Magazines are not considered firearms under federal law, so they do not require an FFL transfer. You can order this magazine directly without going through a licensed dealer. We will ship it to the address you provide during checkout, provided it is within a state that allows magazine sales.

3. Is this magazine compatible with all .40 S&W ammunition?
Yes, this magazine is designed to feed standard .40 S&W ammunition, including both full-metal-jacket (FMJ) rounds for practice and jacketed hollow-point (JHP) rounds for defense. It works with factory loads from major manufacturers like Federal, Winchester, Speer, and Remington. Handloads should be loaded to standard OAL (overall length) specifications to ensure reliable feeding.

4. What warranty applies to this magazine?
This is a factory Beretta product, and it is covered by Beretta’s standard warranty against defects in materials and workmanship. Beretta typically warrants their magazines for the lifetime of the original owner against manufacturing defects. If you encounter an issue, contact Beretta customer service directly with proof of purchase. We also accept returns within 30 days if the magazine is unused and in its original packaging.

5. What is your return policy for this item?
We accept returns on unused, unopened magazines within 30 days of delivery for a full refund minus shipping costs. If the magazine is defective or damaged in transit, we will replace it at no cost to you. To initiate a return, contact our customer service team for a return authorization number. Magazines that have been used or modified are not eligible for return.

Closing CTA

This BER MAG PX4 COMP 40SW 10RD is in stock and ready to ship from our Tennessee warehouse. Whether you need a spare for the range, a backup for home defense, or an extra magazine for concealed carry, this factory Beretta magazine delivers reliable performance without unnecessary features. Add it to your cart and we’ll ship it to your Tennessee address within one business day. For questions about compatibility or shipping, contact our team—we’re here to help.