CMMG, Inc AR-15 Receiver Extension and Stock Kit Review

Let’s Dive into CMMG, Inc AR-15 Receiver Extension and Stock Kit

The CMMG, Inc AR-15 Receiver Extension and Stock Kit offers a complete solution for those looking to build or upgrade their AR-15 lower receiver with a fixed A1-style stock. CMMG is a respected name in the AR-15 world, known for producing quality components, and this kit aims to provide everything needed for a solid, reliable fixed stock assembly. This kit promises a classic aesthetic and dependable performance, making it an attractive option for both retro builds and those who prefer a fixed length of pull.

I’ve always appreciated the simplicity and robustness of the A1 stock, having used M16A1s extensively during my time in the military. Finding a quality kit to replicate that feel for a retro AR build was a must. I was looking for a complete, reliable solution that didn’t require piecing together individual parts from various sources.

Upon unboxing, the components felt solid and well-made, the polymer stock had a nice heft, and the receiver extension exhibited clean machining. The black finish on the stock was consistent and appeared durable. My initial impression was that this wasn’t a cheap, flimsy kit, but rather a thoughtfully assembled package ready for installation.

I considered other fixed stock options from Brownells and Fulton Armory, but the CMMG kit’s completeness and price point swayed me. The all-in-one aspect of this kit meant I wouldn’t have to worry about compatibility issues between different manufacturers’ parts. My first impression was one of cautious optimism – eager to see how it performed in a real-world build.

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Real-World Testing: Putting CMMG, Inc AR-15 Receiver Extension and Stock Kit to the Test

First Use Experience

My first outing with the CMMG, Inc AR-15 Receiver Extension and Stock Kit was at my local shooting range. I incorporated it into a retro-style AR-15 build. The A1 stock felt familiar and comfortable against my shoulder, reminiscent of my military days.

I tested the rifle in relatively dry conditions, and the stock provided a stable and consistent cheek weld. The fixed length of pull was perfect for my arm length, offering better control and accuracy compared to adjustable stocks I’ve used. Installation was straightforward, and the rifle functioned flawlessly through several hundred rounds.

The fixed stock provides a more solid and consistent shooting platform, which I found to be a definite improvement over some adjustable stocks that can sometimes feel wobbly. I experienced no issues with the rifle’s cycling or function related to the buffer assembly or action spring included in the kit. My initial surprise was just how much I enjoyed returning to the classic A1 stock feel after years of using adjustable options.

Extended Use & Reliability

After several months and numerous range trips, the CMMG, Inc AR-15 Receiver Extension and Stock Kit has held up exceptionally well. There are no visible signs of wear and tear on the stock or receiver extension. The polymer seems resistant to scratches and abrasions.

Maintenance has been minimal; a simple wipe-down with a lightly oiled cloth after each range session is all that’s needed. The kit has proven to be more reliable than some aftermarket adjustable stocks I’ve used in the past, which required periodic tightening of the adjustment lever. This kit requires virtually no maintenance.

Compared to my experience with other budget-friendly fixed stock kits, the CMMG kit’s superior build quality is noticeable. This kit has significantly exceeded my expectations for a sub-$100 stock kit. It provides the classic A1 feel with modern manufacturing precision.

Breaking Down the Features of CMMG, Inc AR-15 Receiver Extension and Stock Kit

Specifications

• The kit includes a CMMG A1 Receiver Extension, which is a mil-spec rifle-length buffer tube. This ensures compatibility with standard AR-15 lower receivers.
• It comes with a complete Rifle Buffer Assembly, consisting of a rifle buffer and buffer tube. This is crucial for proper cycling and recoil management in a rifle-length AR-15.
• A Rifle Action Spring is included, which is a key component for consistent and reliable cycling. The action spring is specifically designed for rifle-length gas systems.
• The kit features an A1 Rifle length Butt stock Assembly made from durable polymer. The A1 stock provides a fixed length of pull of approximately 13 inches.
• Manufacturer: CMMG ensures quality and reliability. CMMG has a solid reputation in the AR-15 parts industry.
• Fabric/Material: Aluminum, Polymer – The receiver extension is made from durable aluminum, while the stock is made from a sturdy polymer. These materials provide a balance of strength and weight savings.
• Buffer Tube Size: Mil-Spec ensures compatibility with a wide range of AR-15 lower receivers. This allows for easy installation and replacement if needed.
• Length: 15 in is the approximate overall length of the assembled stock. This provides a fixed length of pull suitable for many shooters.
• Condition: New ensures that the components are free from defects and ready for installation. A new kit will provide optimal performance and longevity.
• Weight: 2 lb is the approximate weight of the entire kit. This is a reasonable weight that doesn’t significantly add to the rifle’s overall heft.

These specifications are important because they directly impact the rifle’s performance, reliability, and handling. A mil-spec receiver extension ensures compatibility, while the quality of the buffer assembly and action spring influence cycling smoothness and recoil management. The A1 stock provides a classic feel and fixed length of pull, which some shooters prefer for its simplicity and consistency.

Performance & Functionality

The CMMG, Inc AR-15 Receiver Extension and Stock Kit performs its job admirably, providing a stable and reliable fixed stock solution for AR-15 rifles. The A1 stock offers a comfortable cheek weld and consistent length of pull.

Its strengths lie in its simplicity, durability, and ease of installation. The kit includes everything needed for a complete fixed stock assembly. One minor area for improvement might be the buttpad, which could be made from a slightly softer material for added comfort during extended shooting sessions.

It meets my expectations for a quality fixed stock kit at this price point, delivering solid performance and a classic AR-15 aesthetic.

Design & Ergonomics

The build quality is excellent. The materials used are durable and well-finished. The CMMG, Inc AR-15 Receiver Extension and Stock Kit is relatively lightweight, which contributes to the rifle’s overall balance.

The kit is very user-friendly, requiring only basic tools and knowledge to install. There’s virtually no learning curve. The A1 stock’s fixed length of pull may not be ideal for all users, but it provides a comfortable and familiar shooting experience for many.

Durability & Maintenance

The CMMG, Inc AR-15 Receiver Extension and Stock Kit is designed to last, using high-quality materials that resist wear and tear. I anticipate it will provide many years of reliable service with proper care.

Maintenance is simple. Regular cleaning with a soft cloth and occasional lubrication of the buffer assembly are all that’s required.

Accessories and Customization Options

The kit itself doesn’t include any accessories beyond the core components needed for installation. Customization options are limited due to the fixed nature of the A1 stock.

However, the stock is compatible with various aftermarket slings. You can add a sling swivel to the stock for enhanced carry options. While not explicitly designed for customization, the kit is compatible with any AR-15 lower receiver and associated components.

Pros and Cons of CMMG, Inc AR-15 Receiver Extension and Stock Kit