Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper Review

First Impressions of Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper

The Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper promises a potent combination of accuracy, maneuverability, and the ballistic advantages of the .300 AAC Blackout cartridge. Rock River Arms has a solid reputation for producing reliable and accurate AR-platform firearms, and this upper receiver assembly aims to deliver that same performance in a compact package. This build is designed for those who want a shorter, more controllable AR without sacrificing significant downrange power, especially when using subsonic ammunition.

I was looking for a dedicated upper receiver for my existing AR-15 lower that would allow me to comfortably and effectively hunt hogs in dense brush. The .300 Blackout caliber intrigued me with its subsonic capabilities and ability to be suppressed. I have a friend who sings the praises of the .300 Blackout for hog hunting and I wanted to see what all the hype was about for myself.

Upon unboxing the Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper, I was immediately impressed with the solid feel and clean finish. The black anodized finish is evenly applied, and the quad rail handguard felt sturdy and well-constructed. The weight felt balanced, indicating quality components and assembly.

I considered a similar upper from a smaller manufacturer and a Daniel Defense option, but the Rock River Arms‘ reputation for accuracy and the complete package offered at a competitive price point ultimately swayed my decision. I also liked the inclusion of the Vortex Flash Hider, which is a trusted muzzle device. My initial impression was one of excitement; this upper seemed ready to deliver on its promises.

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Real-World Testing: Putting Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper to the Test

First Use Experience

I tested the Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper at my local outdoor range. The weather was typical for Texas in the summer: hot and humid. I fired both supersonic and subsonic rounds through it to get a feel for its performance with different loads.

The upper functioned flawlessly with both types of ammunition, and the recoil was manageable, even with the supersonic rounds. Accuracy was also immediately apparent; I was easily grouping within 2 MOA at 100 yards with both supersonic and subsonic ammunition using a red dot optic. The upper also cycled reliably in the heat.

Extended Use & Reliability

After several months of regular use, the Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper continues to perform reliably. I have used it on multiple hog hunts and have experienced zero malfunctions. The anodized finish has held up well, showing only minor wear marks.

Cleaning is straightforward, and the barrel is easy to access. After about 500 rounds, I inspected the bolt and found minimal wear. This upper continues to exceed my expectations for a complete upper receiver assembly.

Breaking Down the Features of Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper

Specifications

• Caliber: .300 AAC Blackout – This allows for the use of both supersonic and subsonic ammunition, providing versatility for various applications.
• Overall Length: 24 inches – This offers a compact package without sacrificing too much barrel length, ideal for maneuverability.
• Barrel Length: 16 inches – A good compromise between velocity and compactness, making it suitable for hunting and tactical applications.
• Barrel Profile: Standard – This provides a balance between weight and rigidity, suitable for sustained shooting.
• Gas System Length: Pistol Length – Optimized for the .300 Blackout cartridge, ensuring reliable cycling even with subsonic ammunition.
• Barrel Twist Rate: 1-8 – This is ideal for stabilizing a wide range of bullet weights, including the heavier projectiles commonly used in subsonic rounds.
• Threads per Inch: 5/8×24 – This is the standard thread pitch for .30 caliber barrels, allowing for easy attachment of muzzle devices and suppressors.
• Handguard Type: Free-Float – This enhances accuracy by preventing the handguard from contacting the barrel, reducing unwanted vibrations.
• Muzzle Device: Vortex Flash Hider – This effectively reduces muzzle flash, improving visibility in low-light conditions.
• Finish: Anodized – This provides a durable and corrosion-resistant finish, protecting the upper receiver from the elements.
• Fabric/Material: Forged A4 – This provides a strong and rigid platform for mounting optics and accessories.
• Gas Block Journal Size-Diameter: .750 in – This is a standard size, allowing for easy replacement of the gas block if needed.
• Handguard Length: 12.5 in – This provides ample rail space for mounting accessories such as lights, lasers, and forward grips.
• Handguard Style: Quad Rail – This offers maximum versatility for mounting accessories at various positions around the handguard.
• Gun Rail: Full Top Rail – This allows for easy mounting of optics along the entire length of the upper receiver.
• Barrel Material: Chrome Moly – This provides a good balance between durability and accuracy.
• Bolt Carrier Group Included: COM-SPEC – This ensures compatibility with most AR-15 lower receivers.
• Charging Handle Included: COM-SPEC – This allows for easy operation of the bolt carrier group.
• Weight: 4.8 lb – This is a reasonable weight for a complete upper receiver assembly, contributing to overall rifle balance.
• Mount Type: M-LOK – Although the handguard style is quad rail, M-LOK slots are sometimes incorporated for lighter accessory mounting options.

Performance & Functionality

The Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper performs exceptionally well. Its accuracy is impressive, and the reliability is top-notch. The upper consistently cycles both supersonic and subsonic ammunition without any issues.

The quad rail provides ample space for mounting accessories, and the Vortex Flash Hider effectively reduces muzzle flash. The only minor improvement I could suggest is a slightly smoother charging handle, but that is a personal preference. This upper definitely meets my expectations.

Design & Ergonomics

The Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper features a durable forged A4 receiver and a comfortable quad rail handguard. The overall weight is balanced, and the controls are easily accessible. The black anodized finish is attractive and durable.

There is a slight learning curve if you are new to the AR-15 platform, but the upper is relatively straightforward to install and use.

Durability & Maintenance

The Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper is built to last. The forged A4 receiver and chrome moly barrel are durable and corrosion-resistant. Regular cleaning and lubrication are all that is needed to keep the upper in top condition.

I expect this upper to last for thousands of rounds with proper maintenance.

Accessories and Customization Options

The Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper comes with a Vortex Flash Hider, a complete bolt carrier group, and a charging handle. The quad rail handguard provides ample space for mounting accessories such as optics, lights, lasers, and vertical grips. The upper is compatible with standard AR-15 lower receivers and magazines.

Popular accessories include red dot sights, scopes, suppressors, and weapon lights.

Pros and Cons of Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper

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Who Should Buy Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper?

The Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper is perfect for hunters, tactical shooters, and those who want a compact and versatile AR-15 platform. It is especially well-suited for hog hunting, home defense, and close-quarters shooting. Anyone who wants a reliable and accurate .300 Blackout upper receiver assembly should consider this product.

Those who prioritize lightweight builds may want to explore other options with lighter handguards. Someone primarily shooting long range may also want to consider a different caliber.

A must-have accessory for this upper is a quality optic such as a red dot sight or scope. A suppressor is also highly recommended for those who want to take full advantage of the .300 Blackout’s subsonic capabilities.

Conclusion on Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper

The Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper is a high-quality and reliable product that delivers excellent performance. The accuracy, durability, and versatility of this upper make it a worthwhile investment. The price is justified by the quality of the components and the overall performance.

I would highly recommend the Rock River Arms Coyote Carbine .300 AAC Blackout Completed Upper to anyone looking for a .300 Blackout upper receiver assembly. If you want a compact, reliable, and accurate AR-15 platform, this is an excellent choice.