FAB Defense Glock 42 4-Round Magazine Extension Review

What You Should Know About the FAB Defense Glock 42 4-Round Magazine Extension

The FAB Defense Glock 42 4-Round Magazine Extension is a relatively straightforward aftermarket accessory designed to enhance the capacity and handling of a specific subcompact pistol. FAB Defense, a well-established name in firearms accessories, offers this polymer extension to address a common limitation of many smaller handguns: their limited magazine capacity. This particular model aims to add four rounds to the standard Glock 42 magazine, bringing its total capacity to ten rounds.

My personal journey to this extension began with a desire to maximize the utility of my Glock 42 for concealed carry. While I appreciate its compact size and concealability, the factory magazine capacity often felt a bit anemic for my comfort level in certain scenarios. I considered other grip sleeves that offered a slightly extended grip but didn’t add rounds, and even looked at aftermarket magazines from less reputable brands. Ultimately, the promise of added capacity from a recognized manufacturer like FAB Defense seemed like the most balanced approach.

Upon initial inspection, the extension presents a sturdy, fiberglass-reinforced polymer construction. It feels robust enough for its intended purpose, and the matte black finish blends seamlessly with the Glock’s aesthetic. My first impression was one of cautious optimism; it looked like a functional addition, but I was keenly aware of the potential for installation difficulties reported by some users.

First Use Experience

My initial testing of this magazine extension took place during a dedicated range day, alongside my standard Glock 42 drills. I wanted to see how it performed under typical shooting conditions, including rapid fire and magazine changes. The extension was installed on one of my factory magazines before heading to the range, and I loaded it to its new claimed capacity.

During the first few magazine changes, the added length of the extension was noticeable. It did, however, provide a slightly more substantial purchase for my pinky finger, which offered a bit more stability during reloads. The crucial test was whether the additional rounds would feed reliably without any hiccups or malfunctions.

Extended Use & Reliability

After several range sessions and carrying the Glock 42 with the extended magazine as a backup, the FAB Defense Glock 42 4-Round Magazine Extension has proven to be a surprisingly reliable performer. Despite some initial apprehension due to user feedback, my personal experience with installation and function has been positive. The polymer construction has shown no signs of stress or cracking, even with frequent magazine changes and the occasional accidental drop of a loaded magazine on a padded range floor.

Cleaning and maintenance are straightforward; the extension is essentially part of the magazine assembly. I’ve found that simply cleaning the magazine as usual, ensuring no debris interferes with the follower or spring, is sufficient. Compared to some other aftermarket extensions I’ve encountered in the past, which could become stiff or difficult to remove after extended use, this model has maintained its functionality. It has held up well against the rigors of consistent use, far exceeding my initial expectations.

Specifications

This particular accessory from FAB Defense is designed specifically for the Glock 42 pistol. Its primary function is to increase the magazine capacity by 4 rounds, bringing the total capacity to 10 rounds. The construction material is a durable, fiberglass-reinforced polymer, chosen for its strength and light weight.

The extension itself weighs a mere 37 grams, which is negligible in the overall balance of the firearm. This weight contributes to the overall feeling of a well-integrated component rather than an unwieldy add-on. The black color is standard and matches most Glock finishes, maintaining a discreet appearance.

It is crucial to note that this extension is designed exclusively for the Glock 42. Attempting to fit it on other Glock models or different firearm platforms would be futile. The innovative spring plate mechanism allows the use of the original magazine spring, which simplifies installation and ensures compatibility with the firearm’s feeding system.

Performance & Functionality

The core function of the FAB Defense Glock 42 4-Round Magazine Extension is to reliably deliver those extra rounds into the chamber. In my testing, it excels at this. The transition from the factory 6-round magazine to the 10-round capacity provided by this extension was seamless.

During live fire, I experienced no feeding issues or failure to feed malfunctions that could be attributed to the extension. The follower still moved freely, and the rounds presented themselves to the slide correctly. This level of reliability is paramount for a concealed carry firearm, and the FAB Defense extension delivers it admirably.

Design & Ergonomics

Beyond its capacity-adding function, the extension also positively impacts the ergonomics of the Glock 42. The added length provides a more substantial grip, particularly for shooters with larger hands. This improved grip allows for better control during recoil and more secure handling, especially during dynamic shooting or rapid magazine reloads.

The design incorporates contoured finger indents which are subtle but effective. These indentations provide a tactile reference point and a more secure purchase when manipulating the magazine, especially under stress or with sweaty hands. The extension’s profile is also well-contoured, avoiding any sharp edges that could snag on clothing or cause discomfort during concealed carry.

Durability & Maintenance

The fiberglass-reinforced polymer construction of this extension instills confidence in its long-term durability. It’s designed to withstand the rigors of regular use, including being dropped on occasion, which is a realistic concern for any magazine extension. I haven’t observed any cracks, deformation, or significant wear marks after several months of use and regular reloads.

Maintenance is as simple as maintaining the factory magazine. Disassembly of the magazine with the extension attached is straightforward, allowing for thorough cleaning of the spring and follower. Ensuring that the follower is correctly seated and that no debris is hindering its movement is key to continued reliability.

Accessories and Customization Options

The FAB Defense Glock 42 4-Round Magazine Extension is a standalone component that attaches to an existing Glock 42 magazine. It does not come with any additional accessories, nor does it require any specialized tools for installation beyond what is typically used for magazine disassembly. This simplicity is part of its appeal; it’s a direct upgrade for your existing magazines.

There are no inherent customization options for the extension itself, other than its standard black finish. However, its compatibility with the original Glock 42 magazine components means that if you have other aftermarket parts for your Glock 42 magazines (like replacement springs or followers from other reputable brands), you would integrate them with this extension as you would with a standard floor plate.

Pros and Cons of FAB Defense Glock 42 4-Round Magazine Extension

Who Should Buy FAB Defense Glock 42 4-Round Magazine Extension?

This magazine extension is an excellent choice for any Glock 42 owner looking to increase their firearm’s total round count without resorting to less integrated solutions. It’s particularly beneficial for those who use their Glock 42 for concealed carry and desire a bit more capacity for personal defense. Shooters who find the factory grip a bit too short will also appreciate the added length and improved handling.

Individuals who prioritize a simple, effective upgrade and are comfortable with basic magazine disassembly should consider this product. It’s a straightforward way to enhance the defensive capabilities of your subcompact pistol. Anyone expecting this extension to fit other Glock models, or who is extremely sensitive to even minor increases in firearm dimensions for deep concealment, might want to reconsider.

For optimal use, ensure you have a properly functioning original Glock 42 magazine. While the extension works with the factory spring and follower, starting with a clean, well-maintained magazine will guarantee the best results. No specialized tools are strictly necessary, but a small punch or tool to depress the spring during reassembly can be helpful.

Conclusion on FAB Defense Glock 42 4-Round Magazine Extension

The FAB Defense Glock 42 4-Round Magazine Extension is a well-executed accessory that effectively addresses the capacity limitations of the Glock 42. It provides a noticeable increase in ammunition while simultaneously improving the grip and handling of the firearm. The fiberglass-reinforced polymer construction speaks to its durability, and my personal experience confirms its reliability in delivering those extra rounds consistently.

At its price point of $23.99, this extension offers significant value. It transforms a 6-round magazine into a 10-round unit, a substantial upgrade for a firearm often used for self-defense. For any Glock 42 owner seeking to maximize their pistol’s effectiveness, this product is a highly recommended addition.

I would confidently recommend the FAB Defense Glock 42 4-Round Magazine Extension to those looking for a straightforward, reliable, and cost-effective way to enhance their Glock 42. It’s a smart investment for anyone prioritizing preparedness and enhanced performance from their subcompact carry pistol.