Let’s Talk About Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change
The Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change is a budget-friendly option for converting your AR-15 lower receiver to accept Colt 9mm SMG magazines. Manufactured by ProMag, this adapter boasts a quick-change design, allowing for easy installation and removal without disassembling your firearm. This feature alone piqued my interest, offering a potentially convenient way to switch between calibers on a single lower.
I was looking to build a dedicated 9mm AR pistol without investing heavily in a dedicated 9mm lower receiver. I wanted a solution that allowed me to use readily available and relatively inexpensive Colt-style 9mm magazines. The Pro Mag adapter seemed like a cost-effective way to achieve this, providing a flexible platform for both 5.56 and 9mm configurations.
Out of the box, the adapter feels surprisingly lightweight, due to its predominantly polymer construction. The steel inserts in high-stress areas are a welcome sign, suggesting some level of durability. The two-piece design is straightforward, although the polymer finish initially felt a little rough compared to some higher-end aluminum adapters I’ve seen.
Compared to dedicated 9mm lowers or even some billet aluminum magwell adapters, the Pro Mag block certainly feels less robust. I chose it over a dedicated lower to save money and retain the ability to quickly revert to 5.56. I also considered a more expensive aluminum adapter, but the Pro Mag‘s quick-change feature and lower price point ultimately swayed me.
My first impression was cautiously optimistic. The price was certainly right, and the design seemed functional, but I was skeptical about the long-term durability of the polymer construction. I was eager to test its performance and see if it could live up to the “quick change” claim.
Real-World Testing: Putting Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change to the Test
First Use Experience
I tested the Pro Mag AR-15 / M16 9MM Magazine Adapter Block at my local indoor shooting range with my 7.5″ AR-15 pistol build. The range offered a controlled environment to assess the adapter’s functionality and reliability with various 9mm ammunition types. I used a mix of brass and steel-cased ammo to see how it would handle different feeding characteristics.
Initially, the adapter was a bit tight to install, requiring a little finesse to seat correctly in the magwell. Magazines, particularly the ProMag steel magazines, initially had some friction during insertion and removal. However, after the first few magazines, the adapter seemed to “break in” and magazine changes became smoother.
I encountered a few initial failures to feed with the ProMag steel magazines, especially with flat-nosed bullets. After switching to Metalform magazines, however, the feeding issues disappeared entirely.
Extended Use & Reliability
After several range trips and approximately 500 rounds through the adapter, I’ve gained a better understanding of its long-term performance. The adapter has held up reasonably well, showing no significant signs of wear or cracking in the polymer body. However, the steel components, like the ejector, do show minor wear marks.
Cleaning is fairly straightforward; I simply wipe down the adapter with a cloth and apply a light coat of oil to the steel parts. The quick-change design makes removing the adapter for cleaning very convenient. This allows for a more thorough cleaning of the lower receiver without much hassle.
Compared to my experience with dedicated 9mm lowers, the Pro Mag adapter obviously doesn’t offer the same level of robustness. However, for a budget-friendly conversion, it performs admirably. Its convenience and ease of switching between calibers make it a worthwhile option for recreational shooting.
Breaking Down the Features of Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change
Specifications
The Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change is designed to adapt AR-15 lower receivers to accept Colt 9mm SMG-type magazines. It is compatible with both M16 and AR-15 platforms, offering versatility for various builds. The adapter’s color is black, blending seamlessly with most AR-15 lower receivers.
It is specifically designed for 9mm caliber and utilizes Colt-style SMG magazines, allowing users to build a 9mm AR-15 without needing a dedicated 9mm lower. The adapter is made of high-strength polymer with steel hardware, roller, ejector, and bolt stop. This combination of materials aims to balance durability with cost-effectiveness. It doesn’t include a magazine, requiring the user to provide their own Colt-style 9mm magazines.
The adapter features a quick-change design, enabling installation and removal without requiring disassembly of the lower receiver. The improved innovative 2-part design allows for easy installation and removal. The adapter features a solid fit within the magazine well, ensuring reliable magazine retention.
Performance & Functionality
The Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change performs its primary job of adapting an AR-15 lower to accept Colt 9mm magazines reasonably well. Reliability largely depends on the type of magazines used; Metalform magazines provided flawless performance in my testing. The quick-change feature is a definite plus, allowing for easy caliber swaps.
One potential weakness is the adapter’s reliance on polymer construction, which might not be as durable as aluminum alternatives. Magazine fit can also be a bit tight initially, requiring a break-in period for smoother operation.
Overall, the adapter meets expectations for a budget-friendly 9mm conversion, but it may not exceed them in terms of robustness. Its functionality is adequate for recreational shooting and training, but may not be ideal for high-volume or competition use.
Design & Ergonomics
The adapter’s design is relatively simple, with a two-piece construction that installs from the bottom of the magazine well. The polymer construction makes it lightweight, but also gives it a less premium feel. The quick-change mechanism is well-executed, allowing for easy removal and installation without tools.
The fit in the magazine well is generally good, although some users may experience slight variations depending on their lower receiver. There is a slight learning curve involved in the initial installation, but the included instructions are clear and easy to follow.
Durability & Maintenance
The long-term durability of the Pro Mag AR-15 / M16 9MM Magazine Adapter Block remains a concern due to its polymer construction. However, with proper care and maintenance, it should provide reasonable service life for recreational use. Regular cleaning and lubrication of the steel components will help prevent corrosion and ensure smooth operation.
Repairing the adapter may be difficult if any of the polymer parts break, as replacement parts are not readily available. However, the steel components should be relatively durable and less prone to failure.
Accessories and Customization Options
The Pro Mag AR-15 / M16 9MM Magazine Adapter Block doesn’t come with any specific accessories, as it is primarily designed to adapt the lower receiver for 9mm magazines. It’s compatible with most standard AR-15 lower receivers, allowing users to customize their builds with aftermarket triggers, grips, and stocks. The adapter is specifically designed to work with Colt 9mm SMG-type magazines, limiting magazine choices to that platform.
Pros and Cons of Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change
Pros
- Cost-effective: Significantly cheaper than dedicated 9mm lowers or high-end adapters.
- Quick-change design: Allows for easy and fast caliber conversions.
- Functional LRBHO: Retains last round bolt hold open functionality with compatible magazines.
- Easy Installation: Can be installed without disassembling the lower receiver.
- Lightweight: Polymer construction keeps the overall weight down.
Cons
- Polymer Construction: May not be as durable as aluminum alternatives.
- Magazine Compatibility: Can be picky with magazines; Metalform recommended.
- Potential for Wear: Steel components may show wear over time.
Who Should Buy Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change?
The Pro Mag AR-15 / M16 9MM Magazine Adapter Block is perfect for budget-conscious AR-15 enthusiasts looking to experiment with a 9mm conversion. It’s also ideal for recreational shooters who want the flexibility of switching between 5.56 and 9mm on a single lower. This adapter is suitable for those who prioritize convenience and cost savings over ultimate durability.
This product might not be the best choice for high-volume shooters, competitive shooters, or those who demand maximum reliability. Users who prefer premium materials and long-term durability should consider investing in a dedicated 9mm lower or a higher-end aluminum adapter.
A must-have accessory is a set of reliable Metalform Colt 9mm SMG magazines. Additionally, a quality AR-15 pistol brace or stock will enhance the shooting experience.
Conclusion on Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change
Overall, the Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change is a decent option for those seeking an affordable and convenient 9mm conversion for their AR-15. Its quick-change design and relatively easy installation are definite selling points. The polymer construction raises some concerns about long-term durability, but for the price, it’s a worthwhile trade-off.
The price is definitely justified considering the functionality it provides, especially for recreational use. I would personally recommend it to anyone on a budget who wants to dip their toes into the world of 9mm AR builds.
Give the Pro Mag adapter a try if you are looking for an affordable and easy way to convert your AR-15 to 9mm. Just be sure to invest in quality magazines like Metalform to ensure reliable performance. You won’t be disappointed!