R&D Precision 9mm Colt Pattern Mag Well Insert Review

First Impressions of R&D Precision 9mm Colt Pattern Mag Well Insert

The R&D Precision 9mm Colt Pattern Mag Well Insert promises to bridge the gap between the ubiquitous AR-15 platform and the readily available, affordable, and historically significant Colt-style 9mm magazines. I’ve built several AR-9 platforms over the years, and magazine compatibility has always been a point of frustration, especially with the quirky ergonomics of some Glock magazine adapters. The promise of easy installation and reliable feeding with common Colt mags piqued my interest, and I was eager to see if this insert could simplify my AR-9 builds.

I needed a reliable, affordable, and easy-to-source magazine solution for my next AR-9 pistol build. Glock mags are common, but I always found their steep angle in the AR-15 magwell to be visually unappealing. I’d heard good things about Colt-style magazines and wanted to give them a try.

The insert arrived in simple packaging, which I appreciate – less waste. The first thing I noticed was the weight; it felt substantial. The black anodized finish looked clean and professional, and the machining appeared precise. Holding it, I could immediately tell this wasn’t some cheap, flimsy plastic part.

Compared to some of the polymer Glock mag adapters I’ve used, the R&D Precision insert felt significantly more robust. I also considered a dedicated Colt-style lower receiver, but those can be expensive and limit my flexibility. This insert seemed like a perfect middle ground. My initial impression was definitely excitement. This felt like a quality piece that could solve a nagging problem with my AR-9 builds.

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Real-World Testing: Putting R&D Precision 9mm Colt Pattern Mag Well Insert to the Test

First Use Experience

My first test was at an outdoor range in moderately dusty conditions. I installed the R&D Precision 9mm Colt Pattern Mag Well Insert in a standard mil-spec lower receiver. Installation, as others have noted, was straightforward. The fit was snug, requiring a bit of tapping with a rubber mallet, but it felt secure once in place. I immediately tested it with a few 32-round ASC magazines and a couple of ProMag stick magazines.

Right away, I noticed the magazines seated positively, with a satisfying click. I experienced a few initial failures to feed with the ProMag magazines, but the ASC magazines ran flawlessly. I suspected the ProMags might be the culprit, not the insert. The initial 500 rounds were fired without cleaning the weapon.

Extended Use & Reliability

After several range trips and approximately 2000 rounds, the R&D Precision 9mm Colt Pattern Mag Well Insert has proven to be quite reliable. I’ve primarily used ASC and Duramag magazines, and they have fed consistently. The anodized finish shows no signs of wear, despite regular use and cleaning.

Cleaning is simple; I just wipe it down with a CLP-soaked rag along with the rest of the lower receiver. Compared to some finicky Glock mag adapters I’ve used in the past, the R&D Precision insert has been a breath of fresh air. The positive magazine seating and reliable feeding have significantly improved my AR-9 shooting experience. It definitely outperforms my previous experiences with less robust adapters.

Breaking Down the Features of R&D Precision 9mm Colt Pattern Mag Well Insert

Specifications

• Manufacturer: R&D Precision. They emphasize American-made quality, which is a definite plus.
• Color: Black. A standard, non-reflective finish that blends well with most lowers.
• Gun Make: Colt. Specifically designed for Colt-style 9mm magazines.
• Magazine Capacity: Compatible with various Colt-style 9mm magazine capacities. It works with everything from 10-round to 32-round magazines.
• Condition: New. As expected.
• Caliber: 9mm Luger. Designed exclusively for 9mm.
• Magazine Included: No. The insert itself doesn’t come with magazines, which is standard for this type of product.

These specifications are important because they dictate the compatibility and functionality of the insert. The fact that it’s designed for Colt-style magazines means you’re locked into that ecosystem, but it’s a well-established and reliable one. The 9mm Luger caliber makes it suitable for a wide range of shooting activities, from target practice to home defense.

Performance & Functionality

The R&D Precision 9mm Colt Pattern Mag Well Insert performs its primary job – allowing a standard AR-15 lower to accept Colt-style 9mm magazines – exceptionally well. Magazine changes are smooth and positive, and feeding is generally very reliable. The ejector is well-designed and provides consistent ejection.

The main weakness I encountered was initial reliability with ProMag magazines. However, this seems to be a magazine issue rather than a problem with the insert itself. The need to possibly adjust the ejector is mentioned by other users, so it’s something to keep in mind during installation. It definitely meets my expectations, especially considering the price point.

Design & Ergonomics

The R&D Precision 9mm Colt Pattern Mag Well Insert is machined from T6061 T6 billet aluminum with a hard anodized finish. The use of metal construction is a major plus. The insert feels solid and well-built. The design is simple and functional, with no unnecessary frills.

The fit is snug and secure in a standard mil-spec lower. There’s a slight learning curve in terms of installation, as it requires a bit of finesse to get it properly seated. However, once installed, it’s virtually seamless.

Durability & Maintenance

The T6061 T6 billet aluminum construction and hard anodized finish suggest excellent durability. After several months of use, I haven’t noticed any significant wear or tear. The steel components also feature a nitride finish.

Maintenance is minimal; a simple wipe-down with a CLP-soaked rag is all that’s needed to keep it in good working order. The robust construction and corrosion-resistant finishes should ensure a long lifespan.

Accessories and Customization Options

The R&D Precision 9mm Colt Pattern Mag Well Insert doesn’t come with any accessories, as it’s a standalone component. However, it’s compatible with a wide range of AR-15 accessories, such as pistol grips, stocks, and triggers. The ability to use standard AR-15 parts is a major advantage, as it allows for a high degree of customization.

It’s also worth noting that the insert is designed to work with standard blowback AR-9 uppers. While one user reported issues with the Matador MAT-9, most users seem to have had success with a variety of uppers.

Pros and Cons of R&D Precision 9mm Colt Pattern Mag Well Insert

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Who Should Buy R&D Precision 9mm Colt Pattern Mag Well Insert?

This insert is perfect for AR-15 enthusiasts looking to build a reliable and affordable 9mm pistol or carbine using readily available Colt-style magazines. It’s also a great option for shooters who appreciate the classic look and feel of Colt-style magazines and want to avoid the steep angle of Glock magazines in an AR-15 platform.

Those who should skip this product include individuals who are committed to using Glock magazines exclusively or those who require guaranteed compatibility with all AR-9 upper receivers, regardless of manufacturer.

A must-have modification would be a high-quality trigger upgrade. Reliable magazines like ASC or Duramag magazines are also highly recommended.

Conclusion on R&D Precision 9mm Colt Pattern Mag Well Insert

The R&D Precision 9mm Colt Pattern Mag Well Insert is a well-built, reliable, and affordable upgrade for anyone looking to convert their AR-15 lower to accept Colt-style 9mm magazines. While there may be a slight learning curve in terms of installation and potential ejector adjustment, the overall performance and value proposition are excellent.

At $79.00, the price is definitely justified, especially considering the quality of materials and construction. I would absolutely recommend it to anyone looking for a robust and reliable Colt-style magazine adapter for their AR-9 build. If you’re tired of the quirks of other magazine adapters and want a solid, American-made solution, give the R&D Precision 9mm Colt Pattern Mag Well Insert a try. You won’t be disappointed.