Let’s Talk About Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard
The Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard represents a sweet spot for those seeking a balance between long-range accuracy and manageable weight in an AR-308 platform. This complete upper receiver assembly combines the trusted quality of Aero Precision components with a modern, lightweight handguard system. It promises to deliver a reliable and accurate foundation for any .308 build.
I was looking to upgrade my existing AR-10 rifle for increased accuracy at longer ranges. My old upper receiver felt heavy and lacked the precision I desired for consistently hitting targets at 600 yards and beyond. I wanted a complete upper that I could simply drop onto my existing lower without needing to swap out multiple components.
Upon unboxing, the first thing that struck me was the overall fit and finish of the upper. The anodizing was consistent and even, and the ATLAS S-ONE handguard felt incredibly solid despite its lightweight design. The 4150 Chrome Moly Vanadium barrel looked precisely machined, inspiring confidence in its potential accuracy.
I considered the Palmetto State Armory PA-10 20″ rifle and the Brownells BRN-10 upper receiver. I picked the Aero Precision due to its reputation for quality and the ATLAS S-ONE handguard’s superior ergonomics and weight savings. The Aero Precision name gave me higher expectations for tighter tolerances and better accuracy potential.
My first impression was one of excitement tempered with a bit of skepticism. Would the lightweight handguard really be as rigid as claimed? Would the CMV barrel live up to my accuracy expectations? Only real-world testing would tell.
Real-World Testing: Putting Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard to the Test
First Use Experience
My initial testing of the Aero Precision M5 upper took place at my local shooting range, which offers distances out to 800 yards. I mounted the upper onto my existing DPMS-pattern .308 lower receiver and paired it with a quality LPVO optic. Conditions were sunny with a slight crosswind, presenting a good test of the rifle’s accuracy potential.
The Aero Precision M5 upper performed admirably in the conditions. It cycled flawlessly with both match-grade and surplus ammunition. The rifle-length gas system resulted in smooth recoil, making it easy to stay on target for follow-up shots.
There was almost no adjustment needed, and I was impressed with the performance from the first shot.
Extended Use & Reliability
After several months of regular use, the Aero Precision M5 upper has proven to be exceptionally reliable. I’ve fired several hundred rounds through it, and it has yet to experience a single malfunction. The finish has held up well, showing no signs of wear and tear.
I clean the barrel after each range session, which is easy with a bore snake and some CLP. The anodized finish on the receiver and handguard is also easy to wipe down and keep clean. The CMV barrel is holding up well.
Compared to my previous upper receiver, the Aero Precision M5 is a significant improvement in both accuracy and reliability. The ATLAS S-ONE handguard remains rigid even after being subjected to bumps and scrapes, and the overall build quality is clearly superior. The reliability continues to prove itself.
Breaking Down the Features of Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard
Specifications
The Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard boasts several key specifications. It includes a .308 Winchester caliber, a 20-inch barrel length, and a rifle-length gas system. The barrel has a 1-10 twist rate and is threaded 5/8×24.
The free-float ATLAS S-ONE handguard is 15 inches long. It features M-LOK mounting points and a Picatinny top rail. The receiver is forged from 7075 T6 aluminum, and the barrel is made from 4150 Chrome Moly Vanadium (CMV).
These specifications translate to a rifle that’s optimized for long-range accuracy while remaining reasonably lightweight and maneuverable. The CMV barrel offers a good balance between durability and accuracy potential, while the ATLAS S-ONE handguard provides a comfortable and stable platform for mounting accessories. The rifle length gas system contributes to reducing recoil.
Performance & Functionality
The Aero Precision M5 upper excels in performance and functionality. Accuracy is excellent, consistently producing sub-MOA groups with match-grade ammunition. The rifle-length gas system ensures smooth and reliable cycling, even with a variety of ammunition types.
The strengths of this upper receiver include its accuracy, reliability, and comfortable ergonomics. One potential weakness is the weight, as a 20-inch barrel inherently adds bulk. However, the weight is well distributed, and the lightweight ATLAS S-ONE handguard helps to offset some of the barrel’s weight.
The Aero Precision M5 upper meets and exceeds my expectations. It delivers the accuracy and reliability I was looking for in a .308 AR platform, all while remaining comfortable to shoot and easy to maintain. It lives up to my expectations.
Design & Ergonomics
The design and ergonomics of the Aero Precision M5 upper are well thought out. The build quality is excellent, with tight tolerances and a durable finish. The ATLAS S-ONE handguard is slim and comfortable to grip, and the M-LOK mounting points allow for easy attachment of accessories.
The upper receiver is user-friendly, with no significant learning curve. The included A2 flash hider is effective at reducing muzzle flash, but can be easily swapped out for a preferred muzzle device. The upper receiver assembly is intuitive to work with and requires minimal setup.
Durability & Maintenance
The Aero Precision M5 upper is built to last. The 7075 T6 aluminum receiver and 4150 CMV barrel are both highly durable materials. With proper care and maintenance, this upper receiver should provide years of reliable service.
Maintenance is straightforward. Regular cleaning of the barrel and bolt carrier group is all that’s typically required. The anodized finish on the receiver and handguard is resistant to corrosion and scratches, making it easy to keep the upper looking its best.
Accessories and Customization Options
The Aero Precision M5 upper comes with an A2 flash hider installed. The ATLAS S-ONE handguard provides ample space for mounting accessories such as lights, lasers, and vertical grips. The upper receiver is also compatible with a wide range of .308 AR-compatible optics, triggers, and other aftermarket parts.
The upper is designed to work with DPMS-pattern lower receivers and magazines. This allows for a high degree of customization. You can swap out the flash hider for a muzzle brake or suppressor.
Pros and Cons of Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard
Pros
- Exceptional accuracy with match-grade ammunition.
- Reliable cycling with a variety of ammunition types.
- Lightweight and comfortable ATLAS S-ONE handguard.
- Durable 4150 CMV barrel.
- Smooth recoil due to the rifle-length gas system.
Cons
- 20-inch barrel length can be bulky for some users.
- A2 flash hider may need to be replaced for optimal performance in certain situations.
Who Should Buy Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard?
The Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard is perfect for long-range shooters, hunters, and those looking for a reliable and accurate .308 AR platform. It’s also a great choice for anyone looking to upgrade their existing AR-10 rifle.
Those who prioritize maneuverability over long-range accuracy might want to consider a shorter barrel length. If you are looking for ultra-lightweight, then this is not for you. Those who want a bare-bones, budget-friendly option might also want to explore other options.
A quality optic is a must-have accessory for this upper receiver. A bipod or shooting rest can also help to maximize accuracy. High-quality magazines are also a must.
Conclusion on Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard
The Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard is a well-built and highly capable upper receiver assembly. It delivers exceptional accuracy and reliability, making it a top choice for anyone looking to build or upgrade their .308 AR rifle. While the price may be higher than some other options, the quality and performance justify the investment.
I would wholeheartedly recommend this upper receiver to anyone looking for a top-tier .308 AR platform. It’s a reliable, accurate, and comfortable-to-shoot option that will provide years of dependable service. If you’re serious about long-range shooting or hunting with an AR-10, you owe it to yourself to check out the Aero Precision M5.