The Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi Made a Bold First Impression
The Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi isn’t just another AR barrel; it’s a statement. This barrel promises to deliver enhanced accuracy and reduced weight through its innovative carbon fiber construction.
Years of lugging around heavy, steel-barreled ARs on backcountry hunts had taken their toll. I needed a barrel that would maintain precision shot after shot, without adding unnecessary weight to my already overburdened pack. The carbon fiber design of this Proof Research barrel immediately piqued my interest.
Upon unboxing, the immediate impression was one of quality and innovation. The carbon fiber weave was impeccably applied, and the overall construction felt solid and well-engineered. Holding it, the weight difference compared to a traditional steel barrel was immediately noticeable and incredibly welcome.
I considered barrels from Criterion and Larue Tactical, both renowned for their accuracy. Ultimately, the weight savings promised by the Proof Research carbon fiber construction won me over. My initial excitement was a mix of anticipation for improved accuracy and the sheer relief of potentially lightening my rifle.
Real-World Testing: Putting Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi to the Test
First Use Experience
My initial testing ground was the local shooting range, under relatively ideal conditions – clear skies and minimal wind. I wanted to zero the rifle and get a feel for the barrel’s accuracy potential with my preferred 140 grain ELD Match ammunition. The barrel mated seamlessly to my existing AR-15 upper receiver, a testament to Proof Research’s quality control.
The rifle performed flawlessly, cycling smoothly with no failures to feed or eject. Even after rapid firing strings, the barrel remained noticeably cooler than my previous steel barrel, a definite advantage. There was a slight adjustment period getting used to the longer +2 gas system, however after a few shots and scope adjustment, it was shooting great!
Extended Use & Reliability
After several months of use, including a demanding elk hunt in the Montana backcountry, the Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi continues to impress. There are no signs of significant wear or tear, and the carbon fiber wrap remains intact and secure. Cleaning is as simple as any other barrel.
I did notice a slight shift in POI (Point Of Impact) after a particularly long string of rapid fire during a prairie dog hunt. This is to be expected with any barrel, and it quickly stabilized as the barrel cooled. This Proof Research barrel outperforms my previous steel barrel in terms of weight, heat dissipation, and perceived accuracy.
Breaking Down the Features of Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi
Specifications
Caliber: 6.5 Creedmoor. This caliber offers a flat trajectory and excellent long-range performance.
Barrel Length: 22 inches. The 22-inch length provides a good balance between maneuverability and velocity.
Gas System Length: Rifle +2. This extended gas system length promotes smoother cycling and reduced recoil impulse.
Twist Rate: 1:8 inches. This twist rate is ideal for stabilizing heavier 6.5 Creedmoor projectiles.
Grooves: 4. Four grooves offer a good compromise between accuracy and barrel life.
Thread Pitch: 5/8-24 tpi. The industry standard for larger caliber AR barrels, allowing for a wide range of muzzle devices.
Construction: Carbon fiber wrapped over a match-grade 416R stainless steel core. This innovative construction reduces weight and improves heat dissipation.
These specifications combine to create a high-performance barrel optimized for accuracy and reduced weight. The extended gas system further enhances the shooting experience by mitigating recoil and improving cycling reliability.
Performance & Functionality
The Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi excels in accuracy, easily delivering sub-MOA (Minute of Angle) groups with match-grade ammunition. Its consistent performance makes it an excellent choice for both hunting and target shooting.
The barrel’s greatest strength lies in its combination of accuracy and lightweight design. However, the initial cost can be a deterrent for some shooters. Overall, it meets and exceeds expectations for a premium AR barrel.
Design & Ergonomics
The carbon fiber wrap not only contributes to weight savings but also enhances the barrel’s rigidity. The overall build quality is exceptional, reflecting Proof Research’s commitment to precision manufacturing. This barrel is incredibly user-friendly since it easily drops into an existing AR15 upper receiver.
Durability & Maintenance
The Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi is designed for long-term durability, with the stainless steel core providing excellent resistance to corrosion and wear. Proper cleaning and maintenance will ensure years of reliable service.
Accessories and Customization Options
The 5/8-24 thread pitch allows for the use of a wide variety of muzzle devices, including suppressors and muzzle brakes. The barrel is also compatible with most standard AR-15 components, providing ample customization options. Adding a high-quality scope, such as a Nightforce or Leupold, will further enhance the barrel’s accuracy potential.
Pros and Cons of Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi
Pros
- Exceptional Accuracy: Consistently delivers sub-MOA groups with quality ammunition.
- Lightweight Design: Significantly reduces overall rifle weight compared to steel barrels.
- Improved Heat Dissipation: Stays cooler during rapid firing, maintaining accuracy and extending barrel life.
- Extended Gas System: Promotes smoother cycling and reduces recoil impulse.
- High-Quality Construction: Impeccable carbon fiber wrap and durable stainless steel core.
Cons
- High Initial Cost: Significantly more expensive than traditional steel barrels.
- Potential POI Shift: Can experience a slight POI shift during extended rapid firing.
Who Should Buy Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi?
This barrel is perfect for long-range hunters who prioritize weight savings and accuracy in their AR-15 platform. It is also ideal for competitive shooters seeking to maximize performance and minimize recoil.
This barrel might not be the best choice for budget-conscious shooters. People who prioritize affordability over cutting-edge technology should consider other barrel options.
A high-quality adjustable gas block is a must-have accessory to optimize the barrel’s performance and cycling reliability. Also, match-grade ammunition is essential to unlock the barrel’s full accuracy potential.
Conclusion on Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi
The Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi is a worthwhile investment for serious shooters who demand the best in accuracy and weight savings. Its innovative carbon fiber construction delivers tangible benefits in terms of performance and handling.
While the price is undeniably high, the performance and weight reduction justify the cost for those who value those attributes. I wholeheartedly recommend this barrel to anyone looking to elevate their AR-15’s performance to the next level. It’s time to upgrade your AR and experience the Proof Research difference!