First Impressions of Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver
The Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver promises a blend of lightweight design and robust performance in the .308 AR platform. Aero Precision has built a reputation for quality components, and this complete upper aims to deliver on that promise with its R-ONE handguard and attention to detail. This upper offers a compelling option for anyone looking to build a reliable and accurate .308 AR rifle.
I had been searching for a .308 upper receiver that balanced weight and accuracy for a hunting build. I wanted something more maneuverable than my older, heavier .308, without sacrificing the stopping power of the cartridge. The Aero Precision M5 seemed to strike that balance.
Unboxing the upper receiver, I was immediately impressed by the fit and finish. The anodizing was smooth and even, and the handguard felt solid in my hand. The weight was noticeably lighter than my older DPMS pattern upper, a welcome change.
I was also considering a similar complete upper from Palmetto State Armory and another from Brownells. I ultimately chose the Aero Precision due to their reputation for tight tolerances and consistent quality. The Aero Precision M5 also boasted the R-ONE handguard with the ATLAS attachment system, which appeared more streamlined and user-friendly.
My initial impression was one of excitement and anticipation. The Aero Precision M5 appeared to be a well-made and thoughtfully designed upper receiver. I was eager to get it mounted on a lower and see how it performed at the range.
Real-World Testing: Putting Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver to the Test
First Use Experience
I first tested the Aero Precision M5 upper receiver at my local outdoor shooting range. I mounted it on an Aero Precision M5 lower receiver and used a variety of .308 ammunition, ranging from 150-grain FMJ to 168-grain match loads. The weather was clear and sunny, with a slight breeze.
The upper receiver functioned flawlessly right out of the box. There were no failures to feed or eject, and the rifle cycled smoothly with all types of ammunition. The mid-length gas system provided a noticeable reduction in felt recoil compared to my older rifle.
I did notice that the A2 flash hider produced a significant flash signature, especially with the hotter loads. This wasn’t a major issue at the range, but it could be a concern in low-light hunting situations. Otherwise, the first range trip was a success.
Extended Use & Reliability
After several months of regular use, the Aero Precision M5 upper receiver has continued to perform reliably. I’ve put several hundred rounds through it in various conditions. It still exhibits excellent accuracy and reliability.
The anodized finish has held up well to normal wear and tear. There are no noticeable scratches or dings, despite being bumped around in my gun safe and range bag. The handguard remains solid and secure.
Cleaning and maintenance are straightforward. Standard AR-15 cleaning procedures apply, and the upper receiver disassembles easily for thorough cleaning. I typically clean the bolt carrier group after each range session, and the barrel every few hundred rounds.
Compared to my previous experiences with other .308 ARs, the Aero Precision M5 has been a significant upgrade. It’s lighter, more accurate, and more reliable than my older rifle. I couldn’t be happier with the performance.
Breaking Down the Features of Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver
Specifications
The Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver boasts several key specifications that contribute to its overall performance. It features a .308 Winchester chambering, providing ample stopping power for hunting or tactical applications. The 16-inch barrel strikes a balance between maneuverability and ballistic performance.
The mid-length gas system ensures smooth and reliable cycling, while the 1-10 twist rate stabilizes a wide range of bullet weights. The barrel is threaded 5/8×24 for compatibility with various muzzle devices. The gas block journal size is .750 in, and the 15-inch R-ONE handguard provides ample rail space for accessories.
The upper receiver is compatible with AR-308 lower receivers with a thread pitch of 1-7/16 x 16 and a DPMS High Profile (.210) Tang Rail. It’s important to ensure compatibility with your lower receiver before purchasing. The complete upper does not include a bolt carrier group or charging handle, allowing you to choose your preferred components.
These specifications matter because they directly influence the rifle’s accuracy, reliability, and overall user experience. The mid-length gas system contributes to reduced recoil and increased reliability, while the 1-10 twist rate allows for optimal performance with a variety of bullet weights. The ample rail space on the handguard allows for customization with various optics, lights, and other accessories.
Performance & Functionality
The Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver performs exceptionally well, delivering both accuracy and reliability. I was consistently able to achieve sub-MOA groups with match-grade ammunition. The rifle cycled smoothly and reliably with various types of .308 ammunition.
The main strength of this upper receiver is its accuracy and consistency. The quality barrel and tight tolerances contribute to excellent shot-to-shot repeatability. One area that could be improved is the included A2 flash hider, which produces a noticeable flash signature.
The upper receiver met and exceeded my expectations. I was looking for a reliable and accurate .308 AR, and the Aero Precision M5 delivered on both fronts. It’s a significant upgrade from my previous .308 AR.
Design & Ergonomics
The Aero Precision M5 upper receiver features a well-thought-out design and comfortable ergonomics. The R-ONE handguard is lightweight and provides a comfortable grip. The full top picatinny rail allows for easy mounting of optics and other accessories.
The build quality is excellent, with high-quality materials and precise machining. The upper receiver feels solid and well-made, and the anodized finish is durable and scratch-resistant. There’s a minimal learning curve to using this upper receiver.
Durability & Maintenance
The Aero Precision M5 upper receiver is built to last. The high-quality materials and durable finish ensure that it can withstand the rigors of regular use. I expect this upper receiver to last for many years with proper care and maintenance.
Maintenance is easy and straightforward. Standard AR-15 cleaning procedures apply, and the upper receiver disassembles easily for thorough cleaning. The anodized finish is also easy to wipe down and keep clean.
Accessories and Customization Options
The Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver does not come with a bolt carrier group or charging handle. This allows you to choose your preferred components. It does include an A2 flash hider, which can be easily replaced with other muzzle devices.
The 15-inch R-ONE handguard provides ample rail space for mounting optics, lights, lasers, and other accessories. The handguard is also compatible with M-LOK accessories, allowing for even more customization options. The upper receiver is compatible with most standard DPMS pattern .308 AR lower receivers.
Pros and Cons of Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver
Pros
- Excellent accuracy: Consistently achieves sub-MOA groups with match-grade ammunition.
- Reliable performance: Cycles smoothly and reliably with various types of .308 ammunition.
- Lightweight design: Significantly lighter than other .308 AR upper receivers.
- Durable construction: High-quality materials and durable finish ensure long-lasting performance.
- Ample rail space: The 15-inch R-ONE handguard provides plenty of room for accessories.
Cons
- A2 flash hider produces a noticeable flash signature.
- Does not include a bolt carrier group or charging handle (requires additional purchase).
Who Should Buy Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver?
The Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver is perfect for hunters seeking a lightweight and accurate .308 AR for medium to large game. It’s also well-suited for tactical shooters who require a reliable and customizable platform. Competitive shooters will appreciate the accuracy and consistency of this upper receiver.
Those looking for a complete, ready-to-go upper receiver with a bolt carrier group and charging handle should skip this product. Individuals prioritizing a budget-friendly option may find other complete uppers more appealing, although they might sacrifice some quality and performance. A must-have accessory is a quality bolt carrier group and charging handle to complete the upper’s functionality.
Conclusion on Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver
The Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver is an excellent choice for anyone looking to build a reliable and accurate .308 AR rifle. It combines lightweight design with robust performance and ample customization options. The value proposition is strong, as the price is justified by the quality and performance of the upper receiver.
I would highly recommend the Aero Precision M5 to anyone looking for a top-tier .308 AR upper receiver. It’s a well-made and thoughtfully designed product that delivers excellent results. Build your dream .308 AR today with the Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver!