ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine Review

Table of Contents

First Impressions of ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine

The ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine promises to increase the capacity of your P320 without sacrificing reliability. As someone deeply familiar with firearms and tactical gear, I was intrigued to see if this aftermarket magazine could live up to the performance of factory magazines, especially given its competitive price point.

My P320 is my go-to for home defense and range practice, and I was looking for a higher-capacity magazine to reduce reload times during training sessions. Standard 17-round magazines are good, but the idea of adding three more rounds appealed to me. I had considered other extended magazines from brands like Mec-Gar and Sig Sauer themselves, but the ProMag option presented a more budget-friendly avenue for experimentation.

Upon unboxing, the ProMag magazine felt solid. The steel construction seemed robust, though perhaps a bit rougher in finish compared to the factory magazines. Its weight was noticeably more than the standard magazine, giving a sense of durability. Initial impressions leaned towards cautious optimism – the construction appeared decent, but the real test would be at the range.

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Real-World Testing: Putting ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine to the Test

First Use Experience

I took the ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine to my local indoor shooting range. I wanted a controlled environment to assess its functionality. The magazine loaded into my P320 without issue, clicking firmly into place.

My first few rounds went smoothly; however, by the fifth round, I experienced a failure to feed. Subsequent magazines also suffered from similar issues, particularly when fully loaded. This was disheartening and immediately raised concerns about reliability in critical situations.

Extended Use & Reliability

Over the next few weeks, I continued to test the ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine during multiple range sessions. I tried different types of 9mm ammunition, including FMJ and JHP rounds, hoping to identify a specific ammunition type that might function more reliably. Sadly, the inconsistent feeding persisted.

The magazine body showed no significant wear and tear after a few weeks, but the inconsistent feeding issues made me question its long-term reliability. Cleaning the magazine was straightforward, but that did not solve the issue with failure to feed. It was disappointing, as my experience with factory Sig Sauer magazines has been flawless.

Breaking Down the Features of ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine

Specifications

The ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine is designed to increase the round capacity of your Sig Sauer P320. It features a 9mm Luger caliber and boasts a 20-round magazine capacity. The magazine body is constructed of heat-treated steel, with a black oxide finish for corrosion resistance.

The magazine follower is injection molded, and the spring is made from heat-treated chrome silicone wire. These specifications suggest a durable and reliable product; however, my testing revealed some inconsistencies. The increased capacity is appealing, but the reliability of feeding is paramount.

Performance & Functionality

The ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine promises higher capacity, but its performance fell short of expectations. The primary issue was inconsistent feeding, leading to frequent stoppages. This unreliability makes it unsuitable for self-defense or high-stress situations where consistent performance is crucial.

The magazine’s strength is its robust steel construction. Its weakness lies in its inconsistent feeding reliability. It simply does not meet the performance standards I expect from a magazine intended for use in a serious firearm.

Design & Ergonomics

The magazine’s design is straightforward; it resembles a standard P320 magazine but with an extended length to accommodate the additional rounds. The steel construction gives it a substantial feel, which some may find reassuring. The finish is functional but not particularly refined.

Loading the magazine to its full 20-round capacity can be a bit stiff, especially with new magazines. However, the design does not compensate for the spring tension, and this likely contributes to feeding issues.

Durability & Maintenance

The heat-treated steel construction suggests good durability. The black oxide finish should provide adequate corrosion resistance under normal use. Cleaning the magazine is relatively simple; it disassembles easily for maintenance.

However, durability is secondary to functionality. Even if the magazine lasts for years, its unreliability makes it a poor choice. Regular cleaning may help mitigate some issues, but the underlying design seems to be the main culprit.

Accessories and Customization Options

The ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine does not come with any additional accessories. It is designed as a direct replacement for the standard P320 magazine. There are no customization options specifically for the magazine itself.

Compatibility with magazine pouches and carriers should be similar to that of extended factory magazines. Some adjustments to your existing gear may be necessary due to the extended length.

Pros and Cons of ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine

Pros

Increased magazine capacity (20 rounds).
Durable steel construction.
Relatively inexpensive compared to factory magazines.

Cons

Inconsistent feeding and reliability issues.
May not be suitable for self-defense or high-stress situations.

Who Should Buy ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine?

The ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine might be suitable for casual range shooters looking for higher capacity at a lower cost, and who are willing to tolerate occasional malfunctions. However, due to its reliability issues, anyone relying on their P320 for self-defense, competition, or duty use should avoid this product.

Those individuals should invest in factory Sig Sauer magazines or magazines from reputable aftermarket manufacturers with a proven track record for reliability. A must-have modification would be to replace the magazine spring with a higher quality spring, though that might not solve the underlying issues.

Conclusion on ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine

The ProMag Steel Sig Sauer P320 9mm 20-Round Pistol Magazine promises a lot but ultimately falls short in a critical area: reliability. While the increased capacity and durable construction are appealing, the consistent feeding issues make it difficult to recommend, especially for serious applications. The price may be tempting, but reliability is paramount.

The value proposition is questionable, as the risk of malfunction outweighs the cost savings compared to more reliable options. I would not personally recommend this magazine for anyone who needs to depend on their P320 for self-defense or other critical situations. Invest in quality; your life may depend on it.