Rock River Arms 20in Predator HP Upper V2 Review

First Impressions of Rock River Arms 20in Predator HP Upper V2

The Rock River Arms 20in Predator HP Upper V2 is a dedicated hunting upper receiver designed for AR-15 platforms, chambered in the potent .243 Winchester cartridge. Rock River Arms has a solid reputation for producing accurate and reliable AR-platform rifles and components, and this upper aims to bring that reputation to the predator hunting world, specifically. It features a 20-inch fluted barrel, a free-float handguard, and an RRA Operator Brake, all geared towards maximizing accuracy and minimizing recoil for those crucial long-range shots.

As a seasoned hunter myself, I was drawn to the Rock River Arms 20in Predator HP Upper V2 because I needed an upper receiver that could deliver consistent accuracy at longer distances for predator control on my property. My current AR setup in 5.56 just wasn’t cutting it for ethically taking coyotes past 300 yards in the open fields. I wanted something with more knockdown power and flatter trajectory, and the .243 Winchester seemed like a great fit.

Upon unboxing, the first thing I noticed was the solid feel of the upper. The stainless steel barrel and the hefty free-float handguard give it a sense of quality and durability. The finish is clean and even, and all the components seemed to be well-fitted. Compared to other uppers I’ve handled, like the similar offerings from Stag Arms and Brownells, this one feels more purpose-built and refined, less like a general-purpose AR upper.

My first impression was definitely positive, even though the weight of the upper was more than I was expecting. The quality and attention to detail, however, excited me and gave me confidence in its potential performance. I was eager to get it mounted on my lower and head to the range.

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Real-World Testing: Putting Rock River Arms 20in Predator HP Upper V2 to the Test

First Use Experience

I tested the Rock River Arms 20in Predator HP Upper V2 at my local outdoor shooting range. The weather was clear but cold, around 35 degrees Fahrenheit, with a slight crosswind.

The upper mated perfectly with my existing AR-15 lower receiver. The first few shots were a bit of a surprise due to the .243’s recoil compared to the usual 5.56. I quickly got used to it.

The RRA Operator Brake did an excellent job of mitigating recoil and muzzle rise. I was able to maintain a good sight picture even with rapid follow-up shots. The accuracy was immediately apparent, with tight groupings at 100 yards right out of the gate.

Extended Use & Reliability

After several weeks of use, including two predator hunting trips, the Rock River Arms 20in Predator HP Upper V2 continues to perform admirably. I’ve put about 200 rounds through it, and it has functioned flawlessly.

There are no signs of undue wear and tear, and the stainless steel barrel seems to be holding up well to the elements. Cleaning is straightforward. The stainless steel wipes down easily, and the bore is simple to clean with a standard cleaning rod and bore brush.

Compared to my previous experiences with other AR uppers, the Rock River Arms 20in Predator HP Upper V2 definitely outperforms them in terms of accuracy and long-range performance. This upper is the first AR setup I have felt confident using for ethical shots beyond 300 yards.

Breaking Down the Features of Rock River Arms 20in Predator HP Upper V2

Specifications

The Rock River Arms 20in Predator HP Upper V2 boasts a number of key specifications that contribute to its accuracy and performance:

• Caliber: .243 Winchester. This cartridge provides a flatter trajectory and greater energy than the standard 5.56 NATO, making it suitable for longer-range engagements.
• Barrel Length: 20 inches. This barrel length maximizes the .243 Winchester’s velocity potential for optimal bullet performance at extended ranges.
• Overall Length: 30 inches. The overall length accommodates the longer barrel and ensures proper balance.
• Barrel Profile: Standard. This provides a good balance of weight and rigidity.
• Gas System Length: Rifle Length. Rifle-length gas systems are known for smoother recoil impulse and increased reliability.
• Barrel Twist Rate: 1-10. The 1:10 twist rate is ideal for stabilizing a wide range of bullet weights commonly used in .243 Winchester.
• Threads per Inch: 5/8×24. This is a common thread pitch for larger-caliber AR barrels, providing ample surface area for muzzle device attachment.
• Handguard Type: Free-Float. Free-floating the barrel enhances accuracy by preventing pressure from the handguard from affecting barrel harmonics.
• Handguard Length: 17 in. The generous handguard length offers ample space for mounting accessories and provides a comfortable grip.
• Muzzle Device: RRA Operator Brake. This brake effectively reduces recoil and muzzle rise.
• Color: Steel. The natural steel finish is durable and resists corrosion.
• Fabric/Material: Stainless Steel. Stainless steel construction ensures longevity and resistance to rust.
• Gun Rail: Full Top Rail. The full-length Picatinny rail allows for easy mounting of optics and other accessories.
• Gun Model: Universal. Designed to fit any standard AR-15 lower receiver.
• Weight: 6 lb. A sturdy weight that contributes to stability.
• Magazine Included: No. Magazines are typically paired with the lower receiver.

These specifications combine to create an upper receiver that is optimized for accuracy, reliability, and long-range performance in a predator hunting or target shooting context.

Performance & Functionality

The Rock River Arms 20in Predator HP Upper V2 performs exceptionally well in its intended role.

The accuracy is outstanding, consistently delivering sub-MOA groups with match-grade ammunition. The .243 Winchester cartridge provides a flat trajectory and ample energy for ethical kills on predators at distances exceeding 300 yards. The rifle-length gas system and RRA Operator Brake work in tandem to mitigate recoil, allowing for faster follow-up shots and improved accuracy.

The only area for potential improvement might be a slightly lighter barrel profile to reduce overall weight, particularly for extended periods in the field. The upper exceeded my expectations for accuracy and recoil management.

Design & Ergonomics

The build quality of the Rock River Arms 20in Predator HP Upper V2 is excellent. The stainless steel barrel and robust handguard contribute to a solid and durable feel.

The weight, while substantial at 6 pounds, provides stability. The long handguard offers ample space for a comfortable grip and allows for the mounting of various accessories, such as bipods and lights. There’s no significant learning curve; it installs easily on any standard AR-15 lower.

Durability & Maintenance

The stainless steel construction of the Rock River Arms 20in Predator HP Upper V2 ensures excellent durability and corrosion resistance.

With proper maintenance, this upper should last for many years. Cleaning is straightforward, requiring only standard AR-15 cleaning tools and solvents.

Accessories and Customization Options

The Rock River Arms 20in Predator HP Upper V2 features a full-length Picatinny rail on top, allowing for easy mounting of optics such as scopes or red dot sights with magnifiers.

The free-float handguard is also compatible with M-LOK accessories. This provides for the attachment of lights, lasers, bipods, and other accessories. The muzzle threads accept any standard 5/8×24 muzzle device, including suppressors. While the included RRA Operator Brake is effective, users can customize with their preferred muzzle device.

Pros and Cons of Rock River Arms 20in Predator HP Upper V2