ProMag Glock 42 .380 ACP Pistol Magazine Review

Was the ProMag Glock 42 .380 ACP Pistol Magazine the Right Choice?

The quest for reliable spare magazines can sometimes feel like a treasure hunt, especially when you’re looking for something that offers a bit more than the standard issue. My search led me to the ProMag Glock 42 .380 ACP Pistol Magazine, a product built from DuPont Zytel Polymer with a full-length steel internal insert. I needed a reliable backup for my Glock 42, something that could handle the rigors of frequent range use and the potential for daily carry.

The factory magazines for the Glock 42, while functional, are relatively spartan in their design. I was looking for a magazine that offered a slightly different perspective, perhaps one that made ammunition checks more intuitive. The idea of a readily available, cost-effective alternative was appealing, especially when considering the cost of OEM spares. I had briefly considered other aftermarket brands, but ProMag has a reputation for producing functional, albeit sometimes controversial, accessories.

My initial impression upon unboxing was one of practical utility. The polymer felt robust, and the internal steel insert suggested a degree of underlying reinforcement. It didn’t feel like a flimsy afterthought, but rather a deliberate attempt to provide a functional component at a competitive price point.

Real-World Testing: Putting ProMag Glock 42 .380 ACP Pistol Magazine to the Test

First Use Experience

My first encounter with this ProMag magazine was at the indoor range, a controlled environment where new gear can be evaluated without external pressures. I loaded it up with a variety of .380 ACP ammunition, including some common brands and a few less common loads, to see how it would feed. The magazine slid into the Glock 42 with a familiar click, though I immediately noticed a subtle difference in how it seated compared to the factory magazines.

Unlike the factory mags which have witness holes on the rear, this ProMag features them on the side. This design choice, while subtle, proved immediately useful for a quick visual check without dropping the magazine entirely. In terms of cycling, the action was smooth for the first few rounds, but the user feedback about needing to “tap” the magazine to ensure proper seating and feeding began to resonate.

Extended Use & Reliability

After several range sessions, spanning perhaps a dozen load/unload cycles and a couple of hundred rounds through two of these magazines, the initial impressions began to solidify. The side-mounted witness holes remained a welcome feature for quick ammo status checks. However, the issue of fitment and reliability, as noted by other users, became apparent.

On a few occasions, especially when the magazine was fully loaded and inserted with a bit of speed, the slide did not lock back correctly after the last round. This necessitated a firm tap on the base of the magazine to ensure it was fully seated and that the follower was properly aligned to engage the slide lock. This unreliability is a significant concern for a component that is critical for the defensive use of a firearm.

Durability, at least on the surface, seemed adequate. There were no visible cracks or significant wear on the polymer body after this initial testing phase. However, the inconsistent seating and occasional failure to feed indicate a potential long-term issue with tolerance or design. Maintenance was straightforward; disassembling the magazine for cleaning was comparable to factory models, involving the removal of the base plate and follower.

Breaking Down the Features of ProMag Glock 42 .380 ACP Pistol Magazine

Specifications

This particular magazine is designed for the Glock 42 .380 ACP Pistol. It boasts a construction of DuPont Zytel Polymer, which is a common and generally durable material for firearm magazines. A significant structural element is the full length steel internal insert, intended to add rigidity and reinforce the polymer body.

The magazine includes an injection-molded mag follower and a mag spring formed from chrome silicone wire. These components are crucial for consistent feeding and longevity. The price point of $21.99 positions this magazine as a more budget-friendly alternative to OEM Glock magazines, which often retail for a higher sum.

The side-mounted witness holes are a distinctive design feature, allowing for a quick visual confirmation of the round count. This deviates from the more common rear-facing witness holes found on many Glock magazines, including the factory ones for the G42. The material choices suggest a focus on durability and cost-effectiveness, common hallmarks of ProMag products.

Performance & Functionality

The primary function of any firearm magazine is to reliably feed ammunition into the firearm. In this regard, the ProMag Glock 42 .380 ACP Pistol Magazine delivers mixed results. While it does feed rounds, the consistency is where it falters. The need to tap the magazine to ensure proper seating and lock-back after the last round is a significant drawback.

The failure to feed issue, while not constant, occurred enough times to raise serious questions about its reliability, especially in a self-defense scenario where every round counts and malfunctions must be avoided. The side witness holes, while a neat idea for ease of visual inspection, do not compensate for the mechanical inconsistencies observed during testing. It meets the basic requirement of holding ammunition, but its performance falls short of the dependable functionality expected from a critical firearm component.

Design & Ergonomics

The design of the ProMag Glock 42 .380 ACP Pistol Magazine is functional, albeit with some ergonomic considerations. The use of DuPont Zytel Polymer provides a decent grip, and the overall shape is familiar to anyone accustomed to Glock magazines. The extended base, while not offering a higher capacity, does provide a bit more surface area for a firm grip during magazine changes.

The side witness holes are a clever ergonomic addition, making it easier to quickly gauge the remaining rounds without having to drop the magazine. However, the core issue lies in the fitment. The slight looseness that necessitates a tap to ensure proper seating detracts from the otherwise straightforward ergonomics. This minor annoyance, while not a deal-breaker in casual range use, could be a significant problem under stress.

Durability & Maintenance

Based on my initial testing, the material durability of the ProMag Glock 42 .380 ACP Pistol Magazine seems reasonable for its price point. The DuPont Zytel Polymer is a known quantity for resilience against impacts and general wear. The inclusion of a full length steel internal insert is a positive indicator for the magazine’s structural integrity, potentially preventing bulging or deformation over time.

Maintenance is uncomplicated. The magazine disassembles easily, allowing for cleaning of the follower and spring, and inspection of the feed lips. The chrome silicone wire spring is generally known for its resistance to taking a set, which bodes well for sustained use. However, the long-term durability of the inconsistent fitment remains a question mark; repeated forceful seating could potentially exacerbate any tolerance issues over time.

Accessories and Customization Options

The ProMag Glock 42 .380 ACP Pistol Magazine typically comes as a standalone unit with no significant accessories included. The primary “customization” comes from the design itself, namely the unique placement of the witness holes. It is designed to be a direct replacement or supplement to the factory magazine for the Glock 42.

Compatibility with other aftermarket accessories for Glock magazines, such as extended base pads, is generally not a feature of this specific ProMag model. Its focus is on providing a functional alternative at a lower cost. Therefore, if you are looking for extensive customization options or a platform for adding extended base plates, this magazine might not be the ideal choice.

Pros and Cons of ProMag Glock 42 .380 ACP Pistol Magazine

Who Should Buy ProMag Glock 42 .380 ACP Pistol Magazine?

This ProMag Glock 42 .380 ACP Pistol Magazine is best suited for Glock 42 owners who are primarily looking for a cost-effective way to increase their magazine count for range practice or casual training. If you prioritize having more magazines on hand for extended range days and are willing to accept a potential need for a slight tap to ensure seating, then this might fit your needs. It’s also a viable option if you’re on a very tight budget and need a spare, but understand its limitations.

However, individuals who prioritize absolute reliability, especially for self-defense or duty use, should probably steer clear of this magazine. If you demand flawless performance and are unwilling to accept any potential for malfunctions, investing in OEM Glock magazines or other highly-regarded aftermarket options would be a wiser choice. For those who need sterile, precision-grade components, this product would not be suitable; its application is firmly within the realm of civilian firearm ownership for training purposes.

For users who do opt for this magazine, consider purchasing only one or two initially to test their specific performance in your firearm. It is also advisable to ensure your Glock 42’s magazine catch and well are in perfect condition, as a tight tolerance from the firearm might exacerbate any looseness from the magazine.

Conclusion on ProMag Glock 42 .380 ACP Pistol Magazine

The ProMag Glock 42 .380 ACP Pistol Magazine presents a compelling value proposition on paper, offering a significantly lower price point than its factory counterparts while incorporating some thoughtful design elements like the side witness holes. The materials used, such as DuPont Zytel Polymer and a steel internal insert, suggest a solid build designed for reasonable durability. The inclusion of a chrome silicone wire spring further bolsters the expectation of longevity.

However, real-world performance brings these expectations down a notch. The primary concern revolves around its reliability, specifically the tendency for a loose fit that requires a tap for proper seating and the potential for failures to feed or incorrect slide lock-back. While it may function adequately for casual range sessions, these inconsistencies make it a difficult recommendation for situations where dependable feeding is paramount.

Ultimately, if your goal is to simply have more magazines for plinking or basic range practice and you are mindful of its potential quirks, the ProMag Glock 42 .380 ACP Pistol Magazine can be a budget-friendly addition to your kit. But for any application demanding unwavering reliability, especially self-defense, I would strongly advise investing in higher-quality, proven magazines.