Elevate Your AR-15: Unveiling the CMMG A1 Fixed Stock Kit (UPC 815835010168)

For serious AR-15 enthusiasts, competitive shooters, or dedicated firearm builders seeking unwavering stability, classic aesthetics, and enhanced reliability, the CMMG A1 Fixed Stock Kit (Part No. 55CA646) presents an unparalleled solution. This meticulously engineered kit provides a complete foundation for a fixed-stock AR-15 configuration, offering advantages in terms of consistent cheek weld, robust recoil management, and a timeless profile. Whether you're upgrading an existing rifle, completing a new build, or aiming to comply with specific state regulations that favor fixed stocks, understanding the profound impact of this CMMG component is crucial.

Why Choose a Fixed Stock for Your AR-15? Exploring the Benefits of the CMMG A1 Kit

Many AR-15 owners ponder the choice between a collapsible and a fixed stock. While collapsible stocks offer adjustability for various body sizes or armor configurations, the CMMG A1 Fixed Stock Kit delivers distinct advantages for specific use cases.

Who is this kit for?

• Precision Shooters: Individuals who prioritize a consistent, repeatable cheek weld for maximum accuracy, especially when engaging targets at extended ranges or participating in precision shooting disciplines.
• Home Defense Enthusiasts: Those seeking a robust, non-collapsible option that provides a solid platform for rapid target acquisition and recoil control in high-stress situations.
• AR-15 Builders & Customizers: Anyone embarking on a new AR-15 build or looking to convert their existing rifle to a fixed-stock configuration for a classic look or enhanced stability.
• Compliance-Minded Owners: In regions with specific firearms legislation that may restrict adjustable stocks or define minimum overall length requirements, a fixed stock like the CMMG A1 can be an essential component for legal compliance.
• Recoil Management Seekers: The solid, non-moving nature of a fixed stock inherently contributes to better recoil absorption and allows for a more controlled shooting experience, especially with higher caliber AR variants.
• Collectors and Purists: Those who appreciate the historical accuracy and classic lines of the original M16/AR-15 designs will find the A1 fixed stock an authentic and appealing choice.

What problems does the CMMG A1 Fixed Stock Kit solve?

• Inconsistent Cheek Weld: Collapsible stocks can sometimes shift or have slight play. The A1 fixed stock eliminates this, providing a rock-solid, repeatable cheek weld shot after shot, critical for precision.
• Durability Concerns: With fewer moving parts, fixed stocks like the CMMG A1 are inherently more durable and less prone to breakage or malfunction under extreme conditions compared to some collapsible designs.
• Recoil Control Issues: The extended surface area and solid attachment of a fixed stock help distribute recoil more effectively, leading to reduced muzzle rise and faster follow-up shots.
• Regulatory Compliance: For areas where collapsible stocks might be restricted, this kit offers a straightforward path to compliance without sacrificing performance.
• Ergonomic Instability: For shooters with a consistent shooting stance, the fixed length of the A1 stock offers unwavering stability that can enhance comfort and reduce fatigue during prolonged shooting sessions.
• Aesthetics and Authenticity: Many prefer the clean, classic lines of a fixed stock, reminiscent of early AR-15 and M16 platforms, offering a timeless aesthetic that modern collapsible stocks often lack.

The Anatomy of Stability: Components of the CMMG A1 Fixed Stock Kit

The CMMG 55CA646 kit is designed as a comprehensive solution, providing all the necessary components for a seamless fixed-stock installation. This isn't just a stock; it's a complete system optimized for performance.

Key components included:

• A1 Fixed Stock (Black Synthetic): The core of the kit, manufactured from robust, high-impact synthetic material, ensuring longevity and resilience. Its ergonomic design provides a comfortable and consistent shoulder purchase. The A1 length is often preferred by many shooters for its balance and classic feel.
• Receiver Extension (Buffer Tube): A precisely machined aluminum tube that houses the buffer and buffer spring. This commercial-spec receiver extension provides the necessary channel for the buffer system to operate smoothly, absorbing recoil and facilitating reliable cycling.
• Buffer: An essential component that interacts with the bolt carrier group (BCG) to absorb recoil energy and cycle the action. The weight and design of the buffer included are optimized by CMMG for standard AR-15 operations, ensuring reliable performance.
• Buffer Spring: This critical spring works in conjunction with the buffer to return the BCG to battery after each shot, contributing significantly to the rifle's cycling reliability. CMMG includes a high-quality spring designed for consistent function.
• Stock Screw: A heavy-duty screw specifically designed to securely attach the A1 fixed stock to the receiver extension, ensuring a rigid and wobble-free connection.
• Sling Swivel: Integrated or included, allowing for easy attachment of a sling for comfortable carrying and enhanced weapon retention.

Each component is manufactured to CMMG's exacting standards, known for their quality and reliability in the AR platform market.

Mastering Your AR-15: Practical Applications and Usage Scenarios

The CMMG A1 Fixed Stock Kit excels in a variety of applications, making it a versatile choice for a wide spectrum of AR-15 owners.

How do I achieve maximum accuracy with my AR-15?
By providing a consistent and unmoving platform, the CMMG A1 fixed stock ensures that your head position and cheek weld remain identical for every shot. This consistency is paramount for achieving tighter groups, especially when utilizing magnified optics or engaging small targets at distance. The solid connection to the shooter minimizes movement, allowing for finer aiming adjustments and improved shot placement.

What is the best setup for a robust and reliable AR-15?
Fixed stocks, by their very nature, are less prone to mechanical failure than collapsible systems due to fewer moving parts. The CMMG A1 kit contributes to a robust and dependable rifle, ideal for situations where reliability is non-negotiable, such as duty use, competitive shooting, or survival scenarios. The sturdy construction means it can withstand more abuse without compromising function.

How can I make my AR-15 feel more balanced and comfortable?
The fixed length of the A1 stock is often considered a "sweet spot" for many shooters, providing an excellent balance point for the rifle, particularly with common barrel lengths. This balance can reduce shooter fatigue during extended sessions and contribute to quicker, more fluid transitions between targets. The classic, ergonomic profile also offers a comfortable and familiar feel for shooters accustomed to traditional rifle stocks.

Is this kit suitable for a "retro" AR-15 build?
Absolutely. The A1 fixed stock is iconic in AR-15 history. Utilizing the CMMG A1 Fixed Stock Kit in a retro build allows you to achieve an authentic aesthetic while benefiting from modern manufacturing quality. It's the perfect choice for those recreating M16A1 or early AR-15 military clones.

Unpacking the Engineering: Technical Specifications and Design Philosophy

The CMMG 55CA646 kit embodies intelligent design, focusing on durability, ease of installation, and uncompromised performance.

• Material Science: The stock is crafted from a durable, impact-resistant synthetic polymer, designed to withstand harsh environments and rigorous use. The receiver extension is typically made from high-grade aluminum, ensuring structural integrity while keeping weight in check.
• Finish: The components feature a classic black finish that is scratch-resistant and non-reflective, suitable for tactical applications or simply maintaining a clean, professional look.
• Ease of Installation: This kit is designed for straightforward installation, making it accessible even for those with limited gunsmithing experience. Standard AR-15 tools are typically all that's required to attach it securely to your lower receiver.
• Compatibility: The CMMG A1 Fixed Stock Kit (Part No. 55CA646, UPC 815835010168) is specifically engineered for AR-15 platforms, ensuring perfect fitment and function with Mil-Spec lower receivers.

Why trust CMMG?
CMMG has established itself as a leading innovator and manufacturer in the AR-15 market. Their commitment to quality, precision engineering, and rigorous testing ensures that components like the A1 Fixed Stock Kit meet and exceed user expectations for reliability and performance. When you choose CMMG, you're investing in a product backed by a reputation for excellence.

Optimizing Your Rifle: Frequently Asked Questions & Expert Insights

Can I install this CMMG A1 Fixed Stock Kit myself?
Yes, the CMMG 55CA646 kit is designed for user-friendly installation. Basic AR-15 armorers tools, such as an armorer's wrench, are generally sufficient. Online tutorials and instructional videos can further guide you through the process, but the components are straightforward to assemble.

What is the length of pull (LOP) for the A1 stock?
The A1 fixed stock typically offers a shorter length of pull compared to the A2 stock, often around 10 inches from the trigger to the end of the buttpad. This makes it a comfortable fit for a wide range of shooters, particularly those who prefer a more compact rifle profile or operate with body armor.

Does this kit include a castle nut and end plate?
No, a fixed stock setup does not use a castle nut or an end plate in the same way a collapsible stock does. The fixed stock screws directly into the receiver extension, which is then securely attached to the lower receiver. This simplifies the assembly and removes potential points of failure.

How does a fixed stock affect the balance of my AR-15?
Fixed stocks generally shift the balance point further towards the rear of the rifle compared to lightweight collapsible stocks, creating a more stable and less "front-heavy" feel. This can be particularly beneficial for rifles with longer barrels or heavier front-end accessories, improving overall handling and reducing shooter fatigue.

Is a fixed stock better for accuracy than a collapsible stock?
While both can be accurate, a fixed stock often offers an inherent advantage for precision due to its absolute consistency. There's no play, no shift, and no potential for unintended movement, allowing for a more repeatable and stable shooting platform, which is critical for maximizing accuracy potential.

The CMMG 55CA646 Receiver Extension & Stock Kit (A1 Fixed Black Synthetic for AR-15, UPC 815835010168) represents a significant upgrade for any AR-15, delivering a blend of classic aesthetics, robust reliability, and enhanced shooting stability. It's an investment in the long-term performance and versatility of your rifle. This exceptional kit is available at DEGuns, your trusted source for premium firearm components and accessories.

Component	Material	Key Feature
A1 Fixed Stock	Synthetic Polymer	Classic, Ergonomic Design
Receiver Extension	Aluminum	Mil-Spec Diameter
Buffer & Spring	Steel	Optimized for AR-15 Reliability
Stock Screw & Swivel	Steel	Secure Attachment & Sling Point

Attribute	Specification	UPC
Product Name	CMMG Receiver Extension & Stock Kit A1 Fixed Black	815835010168
Part Number	55CA646
Compatibility	AR-15 Platform
Stock Type	A1 Fixed
Color	Black
Material	Synthetic / Aluminum
Includes	Stock, Receiver Extension, Buffer, Buffer Spring, Screw