First Impressions of ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine
The ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine aims to modernize the classic Thompson submachine gun’s feeding system. It promises increased capacity and the potential durability of polymer construction, a stark contrast to the original steel drum magazines. As an experienced tactical gear specialist, I’m always eager to explore how new materials and designs can improve upon established platforms, and this magazine piqued my curiosity.
My journey to explore the ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine stemmed from a desire to enhance the reliability and capacity of my Thompson 1927 A1. The original drum magazines can be finicky, and the allure of a lighter, potentially more durable polymer alternative with a higher round count was undeniable. I have experienced feeding issues and weight concerns with traditional drum magazines.
Upon unboxing, the first thing that struck me was the significant weight difference compared to a loaded steel drum. The polymer felt robust, and the construction appeared solid, although the aesthetic lacked the classic appeal of steel. This magazine’s design felt like a trade-off between tradition and modern functionality.
I considered other high-capacity options, including modified stick magazines, but the drum design still offered a unique balance of capacity and profile. The ProMag seemed like a potentially superior version of the classic drum. I ultimately chose the ProMag due to its promise of improved reliability and lighter weight compared to traditional steel drums.
Initially, I was cautiously optimistic. The departure from the classic steel drum aesthetic was a slight disappointment, but the potential for enhanced performance and reliability outweighed that concern. I hoped that the ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine would live up to its promise.
Real-World Testing: Putting ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine to the Test
First Use Experience
My first range trip with the ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine was at my local outdoor range, focusing on rapid-fire drills and target acquisition. I wanted to assess feeding reliability and overall handling with the increased capacity. The weather was dry and mild, typical for a California summer.
The initial loading process was straightforward, though the polymer follower felt slightly less smooth than those in higher-end magazines. However, the magazine seated securely in my Thompson, and I proceeded with firing. After the first few rounds, I was impressed with the feeding, as it was smooth and consistent.
There were no immediate malfunctions, but I did notice that the polymer body retained heat more than a steel magazine would. The magazine did get quite warm after several magazines had been used. This could potentially impact performance in prolonged, high-volume shooting sessions.
Extended Use & Reliability
After several months of regular use, the ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine has held up surprisingly well. I used it over multiple range trips, including a weekend-long training course that involved lots of drills. Despite the initial concerns about heat retention, it continues to function reliably.
While the polymer body shows some minor scuffs and scratches from handling, there are no signs of cracking or deformation. The magazine spring seems to be maintaining its tension well, ensuring consistent feeding. I have also noticed that the polymer is reasonably resistant to solvent-based cleaning products.
Cleaning is simple: disassembly is fairly intuitive, allowing for easy access to all internal components. Occasional lubrication of the spring and follower keeps everything running smoothly. Overall, the ProMag has outperformed my initial expectations.
Breaking Down the Features of ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine
Specifications
The ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine is designed to fit Auto Ordnance Thompson 1927 A1 rifles chambered in .45 ACP. It boasts a 40-round capacity, significantly exceeding the standard stick magazine capacity. The magazine body is constructed from a proprietary DuPont Zytel-based polymer.
The follower is injection molded, and the magazine spring is formed from heat-treated chrome silicon wire. The magazine type is considered a “drum” style, despite its more streamlined profile compared to traditional drum magazines. The .45 ACP caliber offers substantial stopping power.
These specifications are significant because they contribute to the magazine’s overall durability, reliability, and capacity. The polymer construction aims to reduce weight and resist corrosion. The chrome silicon spring is designed for consistent feeding under stress.
Performance & Functionality
The ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine performs its primary function – feeding .45 ACP rounds into a Thompson rifle – with commendable reliability. Accuracy is not directly impacted by the magazine itself, but consistent feeding ensures consistent shot placement. I experienced only a few malfunctions over hundreds of rounds.
Its strength lies in the increased capacity and lighter weight compared to traditional steel drums. A potential weakness is the polymer’s heat retention, which could affect performance in extreme conditions. The ProMag has exceeded my expectations in terms of reliability and durability for a polymer magazine.
Design & Ergonomics
The build quality is generally good, with a solid feel and no obvious manufacturing flaws. The DuPont Zytel-based polymer feels robust and capable of withstanding reasonable abuse. While lighter than steel drums, it still adds noticeable weight to the rifle.
The design is user-friendly, with a straightforward loading process and secure fit in the magazine well. The polymer follower, while not as smooth as metal followers in premium magazines, functions without issue. There is a slight learning curve associated with loading the magazine to its full capacity.
Durability & Maintenance
Based on my experience, the ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine should last for a reasonable amount of time with proper care. The polymer body appears resistant to cracking and deformation. The chrome silicon spring should maintain its tension for an extended period.
Maintenance is relatively simple, requiring only occasional cleaning and lubrication. The magazine can be disassembled for thorough cleaning, and replacement springs are readily available if needed. The ease of maintenance adds to the magazine’s long-term usability.
Accessories and Customization Options
The ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine does not come with any specific accessories. However, its compatibility with standard Thompson 1927 A1 rifles makes it inherently compatible with any accessories designed for that platform, such as slings and cases. There are no direct customization options for the magazine itself.
The ProMag is compatible with aftermarket followers and springs designed for Thompson magazines, allowing for some degree of performance tuning. Users can also apply cosmetic modifications, such as painting or stippling, to the polymer body. Compatibility with existing Thompson accessories enhances its overall value.
Pros and Cons of ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine
Pros
- Significantly increased capacity compared to standard stick magazines, offering more sustained firepower.
- Lighter weight than traditional steel drum magazines, improving handling and reducing fatigue.
- Durable polymer construction resists corrosion and withstands reasonable abuse.
- Reliable feeding ensures consistent performance with minimal malfunctions.
- Easy to clean and maintain, contributing to long-term usability.
Cons
- Polymer construction retains heat more than steel, potentially affecting performance in extreme conditions.
- Aesthetic lacks the classic appeal of traditional steel drum magazines.
Who Should Buy ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine?
The ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine is perfect for recreational shooters who want increased capacity and lighter weight. It is also great for collectors wanting an alternative to expensive and hard-to-find original Thompson drum magazines. This would be a good choice for those participating in historical reenactments or themed shooting events.
Those who prioritize historical accuracy or prefer the feel of steel should skip this product. Competitive shooters seeking ultimate reliability under extreme conditions may also want to explore other options. Those who want a magazine that will stay cool, even when using it heavily, should not purchase this product.
Must-have accessories or modifications include a high-quality magazine loader to ease the loading process and potentially aftermarket springs and followers for enhanced performance.
Conclusion on ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine
The ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine offers a compelling combination of increased capacity, lighter weight, and reasonable reliability. It successfully modernizes the classic Thompson platform without sacrificing functionality. While the polymer construction may not appeal to purists, it offers distinct advantages in terms of weight and durability.
The price is justified considering the increased capacity and enhanced durability compared to some original drum magazines. While not inexpensive, the ProMag offers a good value proposition for those seeking a modern, high-capacity magazine for their Thompson. I personally recommend the ProMag Polymer Thompson .45 ACP 40-Round Rifle Magazine for recreational shooters and collectors seeking increased firepower and improved handling.
If you’re looking to enhance your Thompson experience with a modern, high-capacity magazine, give the ProMag a try. Upgrade your magazine today, and bring your Thompson into the 21st century!