Master Your Big-Bore AR Build: The Aero Precision M5 Complete Lower Receiver with Magpul MOE Grip & PRS Gen3 Stock

For serious firearms enthusiasts, custom builders, long-range precision shooters, and avid hunters seeking an uncompromising foundation for their large-caliber AR platform, the Aero Precision M5 Complete Lower Receiver stands as an unparalleled choice. This meticulously assembled lower receiver provides the ideal starting point for constructing a high-performance AR-10 or AR308 rifle, eliminating the complexities and potential compatibility issues often associated with sourcing individual components. If you've been asking questions like "What is the best complete lower receiver for an AR-10 build?" or "How can I ensure my custom .308 rifle has a stable, feature-rich foundation?", then this Aero Precision M5 offering provides a definitive answer.

Building a custom AR-pattern rifle, especially in larger calibers like .308 Winchester or 6.5 Creedmoor, requires precision and compatibility. The M5 Complete Lower Receiver from Aero Precision takes the guesswork out of assembling the critical lower half. It arrives pre-assembled by experienced specialists, ensuring every component is correctly installed and functioning flawlessly. This not only saves valuable time but also provides peace of mind, knowing your rifle's foundation is built to the highest standards.

Unpacking the Foundation: What's Included in Your Aero Precision M5 Complete Lower

This comprehensive assembly provides everything you need to begin your big-bore AR journey, combining Aero Precision's renowned engineering with premium Magpul accessories for an exceptional user experience right out of the box.

• The M5 Stripped Lower Receiver: The Heart of Your Build

  At its core, the Aero Precision M5 Stripped Lower Receiver sets the industry standard for large-frame AR platforms. Precision-machined from robust 7075-T6 aluminum, an aerospace-grade alloy known for its exceptional strength-to-weight ratio and fatigue resistance, this lower receiver is designed to withstand the demands of powerful cartridges. It is meticulously engineered to ensure seamless compatibility with standard AR308 components and SR25/DPMS-pattern magazines, offering builders a wide array of options for customization. Unlike generic receivers, the M5 features an enhanced forging, providing superior structural integrity and a refined aesthetic that speaks to its quality. This dedicated .308 Winchester/6.5 Creedmoor compatible platform ensures a perfect fit for your chosen upper receiver and internal components.

• Magpul MOE Grip: Ergonomic Control and Comfort

  The included Magpul MOE (Magpul Original Equipment) Grip is a significant upgrade from standard mil-spec grips. Designed for improved ergonomics and handling, the MOE Grip features an anti-slip texture and a comfortable angle that promotes better trigger control and reduced shooter fatigue during extended shooting sessions. Its durable polymer construction ensures longevity and reliability, making it a favorite among shooters for both range use and demanding field conditions. This enhancement immediately improves the interface between the shooter and the rifle, providing a more secure and natural hold.

• Magpul PRS Gen3 Precision Adjustable Stock: Uncompromising Stability and Customization

  For precision shooting, stability and adjustability are paramount, and the Magpul PRS Gen3 (Precision Rifle/Sniper, Generation 3) Adjustable Stock delivers on all fronts. This highly sought-after stock offers an extensive range of tool-less length of pull (LOP) and cheek comb height adjustments, allowing shooters to achieve a perfectly tailored fit for optimal eye relief with various optics and a consistent cheek weld. The PRS Gen3 provides an incredibly stable shooting platform, crucial for long-range accuracy, minimizing movement and enhancing repeatability. Its robust construction, incorporating aluminum components for strength, ensures durability in any environment. Whether you're engaging distant targets from a bench, prone, or supported position, the PRS Gen3's fine-tuning capabilities enable you to maximize your rifle's potential.

• Comprehensive Lower Parts Kit (LPK): Essential Functionality

  The assembly includes a complete Lower Parts Kit (LPK), comprising all the necessary springs, pins, detents, and small components required for full functionality. This includes the trigger group, safety selector, magazine catch assembly, and bolt catch. Importantly, the LPK provided with the M5 Complete Lower incorporates the custom takedown and pivot pins specifically designed for the M5 platform, ensuring a perfect fit and reliable operation. An extended magazine catch button is also included, offering improved ergonomics for faster and more intuitive magazine changes.

• Rifle Receiver Extension and M5 Rifle Buffer and Spring: Recoil Management and Cycling Consistency

  A properly matched buffer system is crucial for the reliable operation and recoil management of any AR-pattern rifle, especially larger calibers. This complete lower features a Rifle Receiver Extension (buffer tube) and the specific M5 Rifle Buffer and Spring designed for the .308 platform. This optimized combination ensures smooth cycling, reduced felt recoil, and consistent performance, contributing significantly to the rifle's overall shootability and reliability. The rifle-length system provides a smoother recoil impulse compared to carbine systems, which is highly desirable for precision shooting and extended range sessions.

• Professional Installation: Save Time and Ensure Precision

  One of the significant advantages of purchasing the Aero Precision M5 Complete Lower is that all these premium parts are expertly installed by trained specialists. This eliminates the need for specialized tools, reduces the risk of incorrect assembly, and ensures that your lower receiver is ready for immediate integration with your chosen upper receiver. This service saves both time and potential frustration, allowing you to focus on the exciting parts of your custom build.

The Aero Precision M5 Lower Receiver: Engineered for Excellence

The M5 Lower Receiver isn't just a standard .308 lower; it's a meticulously redesigned platform with several enhanced features that elevate its performance, ease of assembly, and overall user experience. These innovations demonstrate Aero Precision's commitment to continuous improvement and user-centric design.

• Threaded Bolt Catch Roll Pin: A common frustration during AR assembly is the installation of the bolt catch roll pin. The M5 innovates with a threaded bolt catch roll pin, allowing for easier, more secure installation without the risk of scratching the receiver or marring the finish. This small but significant detail greatly simplifies a traditionally tricky step.
• Integrated Trigger Guard: Unlike standard lowers that require a separate, often flimsy, trigger guard, the M5 features an integrated trigger guard. This robust design enhances the lower's structural integrity, provides a clean aesthetic, and offers ample space for gloved operation, especially critical in cold weather or tactical environments.
• Upper Tension Screw: To eliminate any unwanted "slop" or play between the upper and lower receivers, the M5 incorporates an upper tension screw. This discreet screw allows users to fine-tune the fit between their upper and lower, resulting in a tighter, more cohesive rifle assembly that can contribute to improved accuracy and a more solid feel.
• Threaded Takedown Pin Detent Recess: Another common headache during assembly is the tendency for takedown pin detents and springs to launch into oblivion. The M5 solves this by threading the takedown pin detent recess, securely holding the detent and spring in place during assembly and disassembly, preventing loss and simplifying maintenance.
• Increased Magwell Flare: Speed and efficiency are crucial in dynamic shooting scenarios. The M5's increased magwell flare significantly aids in faster, smoother, and more positive magazine insertions. This wider opening guides the magazine effortlessly into place, reducing fumbling and ensuring reliable reloads, which is a major advantage in competitive shooting or self-defense situations.
• Custom Takedown and Pivot Pins: Specifically designed for the M5 platform, these custom-machined pins ensure a perfect, snug fit and reliable function unique to the Aero Precision M5 ecosystem.
• Extended Magazine Catch Button: Ergonomics are key to rapid operation. The extended magazine release button provides easier access and a more positive feel, allowing for quick and efficient magazine changes without shifting your grip.

Who Benefits? Real-World Applications and Use Cases

The Aero Precision M5 Complete Lower Receiver with Magpul MOE Grip and PRS Gen3 Stock is not just a collection of parts; it's a strategic investment for specific types of shooters and builders.

• Precision Long-Range Shooting Enthusiasts

  For those dedicated to pushing the limits of accuracy at extended distances (e.g., 600 yards, 1000 yards, and beyond), this lower receiver provides the ultimate stable foundation. The Magpul PRS Gen3 stock's unparalleled adjustability allows for a perfect cheek weld and length of pull, crucial for consistent eye relief and minimizing shooter-induced errors. Coupled with the M5's robust construction and tight tolerances, it helps build a rifle capable of exceptional groups downrange. Calibers like 6.5 Creedmoor truly shine on this platform.

• Dedicated Hunters Seeking Reliability and Power

  When pursuing medium to large game, a reliable and powerful rifle is non-negotiable. The M5 lower, compatible with .308 Winchester, provides the necessary stopping power in a semi-automatic platform. Its durability and the ergonomic advantages of the MOE grip ensure dependable performance in varied outdoor conditions. The ability to fine-tune the stock's fit also helps accommodate various shooting positions often encountered in the field.

• Competitive Shooters (e.g., PRS, 3-Gun)

  Competitors demand speed, reliability, and precision. The M5's integrated magwell flare facilitates rapid reloads under pressure, while the PRS Gen3 stock allows for quick adjustments between different stages or shooting positions, optimizing comfort and stability for every shot. The overall robustness of the M5 system stands up to the rigors of competition.

• Tactical and Personal Defense Applications

  For those who prioritize dependability and modularity in a defensive firearm, an M5-based AR-10 offers significant advantages. The platform's ability to chamber powerful cartridges, combined with the proven reliability of Aero Precision components, makes it a formidable tool. The ergonomic enhancements ensure effective handling in high-stress situations.

• Custom AR-10/AR308 Builders

  If you're embarking on a custom build and want to ensure maximum compatibility and reduce assembly time, this complete lower is your ideal starting point. It takes the guesswork out of sourcing a compatible lower parts kit, buffer system, and stock, allowing you to focus on selecting the perfect upper receiver, barrel, and optics to complete your dream rifle. It is the definitive answer to the question, "What do I need to start my custom AR-10 build?"

Optimizing Your Big-Bore AR Build: A Strategic Foundation

Choosing a high-quality lower receiver is arguably the most critical decision when building a custom AR-pattern rifle. It is the legal "firearm" component and serves as the backbone for every other part. A well-engineered lower like the Aero Precision M5 ensures not only reliability and durability but also contributes significantly to the rifle's potential accuracy and overall performance.

The M5 platform is designed specifically for large-frame AR calibers, including the ubiquitous .308 Winchester and the increasingly popular 6.5 Creedmoor. This dedicated design ensures optimal geometry for these cartridges, unlike some multi-caliber lowers that might compromise performance for versatility. The included rifle-length buffer system is specifically tuned for the recoil impulse of these powerful rounds, ensuring smooth cycling and consistent operation.

The inherent value of a pre-assembled, complete lower receiver cannot be overstated. Beyond the time savings, it mitigates the common pitfalls of a DIY build, such as misplacing small parts, damaging receiver components during installation, or encountering compatibility issues between various manufacturers' parts. Aero Precision's factory installation means that the lower receiver is ready for action the moment you pair it with your chosen upper.

When planning the rest of your build, consider pairing this robust lower with a high-quality upper receiver (preferably an Aero Precision M5 upper for a seamless fit), a match-grade barrel suited to your intended range and accuracy goals, an appropriate gas system, and a precision optic. The solid foundation provided by this complete lower allows the rest of your components to perform at their peak.

Frequently Asked Questions (FAQ) about AR-10/AR-308 Lowers and the Aero Precision M5

• What caliber is the Aero Precision M5 lower compatible with?

  The Aero Precision M5 lower receiver is specifically designed for large-frame AR calibers. It is fully compatible with .308 Winchester, 6.5 Creedmoor, and other cartridges based on the .308 case family (e.g., .243 Winchester, .338 Federal), provided the upper receiver and barrel are chambered for that specific round.

• Why choose a complete lower over a stripped lower?

  Opting for a complete lower receiver like the Aero Precision M5 offers significant advantages in convenience, time-saving, and guaranteed compatibility. All necessary components (lower parts kit, buffer system, stock, grip) are pre-installed by specialists, reducing assembly time, eliminating the need for specialized tools, and minimizing the risk of errors often associated with installing small, intricate parts. This is ideal if you're looking for a hassle-free start to your build or want to ensure professional assembly.

• What are the benefits of the Magpul PRS Gen3 stock for precision shooting?

  The Magpul PRS Gen3 stock is engineered for precision. Its primary benefits include extensive tool-less adjustability for both length of pull and cheek comb height, allowing shooters to achieve a perfect, repeatable fit for optimal eye relief and consistent cheek weld. This leads to enhanced stability, reduced shooter fatigue, and improved accuracy, especially crucial for long-range engagements where consistency is key. Its robust construction further contributes to a solid shooting platform.

• Is the Aero Precision M5 lower considered MIL-SPEC?

  While the M5 lower is designed to integrate with many standard AR308/SR25 components, it goes beyond traditional MIL-SPEC standards in several areas. Its enhanced features, such as the threaded bolt catch pin, integrated trigger guard, upper tension screw, and increased magwell flare, are considered upgrades that improve on the baseline MIL-spec design for better user experience, durability, and ease of assembly. It maintains the critical dimensions for compatibility but adds superior functionality.

• Where can I find this product?

  The Aero Precision M5 Complete Lower Receiver with Magpul MOE Grip & PRS Gen3 Stock is a popular and highly regarded component for custom AR-10 builds. For availability and to learn more about starting your build, visit deguns.com.

The Aero Precision Advantage: A Legacy of Quality

Aero Precision has established itself as a leading name in the firearms industry by consistently delivering high-quality, precision-engineered components that exceed expectations. Their commitment to superior manufacturing processes, stringent quality control, and innovative design is evident in every product they produce. The M5 Complete Lower Receiver is a testament to this philosophy, offering builders a foundation that is not only robust and reliable but also thoughtfully designed with the end-user in mind. When you choose Aero Precision, you're investing in a legacy of performance and a product built to last.

The Aero Precision M5 Complete Lower Receiver with Magpul MOE Grip and PRS Gen3 Stock is more than just a component; it's the bedrock upon which you can construct a truly exceptional big-bore AR rifle. Whether your goal is precision long-range shooting, reliable hunting, competitive excellence, or a dependable defensive firearm, this complete lower provides the ultimate starting point, combining convenience, professional assembly, and top-tier components.

Feature	Description	Benefits
Product SKU	APAR308022	Unique identifier for tracking and ordering.
UPC	815421021707	Universal Product Code for easy identification.
Receiver Material	7075-T6 Aluminum	Exceptional strength, durability, and lightweight performance.
Caliber Compatibility	.308 Win, 6.5 Creedmoor, etc.	Versatile for various large-frame AR cartridges.
Included Stock	Magpul PRS Gen3	Precision adjustability for LOP & cheek height, enhanced stability.
Included Grip	Magpul MOE Grip	Improved ergonomics, comfortable handling, anti-slip texture.
Key Lower Features	Threaded Bolt Catch Pin, Integrated Trigger Guard, Upper Tension Screw, Threaded Takedown Detent, Increased Magwell Flare	Simplified assembly, enhanced rigidity, reduced receiver slop, faster reloads.
Assembly Status	Complete & Professionally Installed	Ready for use, saves time, ensures correct installation, reduces build errors.
Buffer System	M5 Rifle Buffer & Spring	Optimized recoil management and reliable cycling for .308 platform.