Let’s Dive into Moriarti Moriarti AR-74 5.45X39 16in M-LOK Upper Assembly
The Moriarti Moriarti AR-74 5.45X39 16in M-LOK Upper Assembly presents a compelling option for AR-15 enthusiasts looking to chamber their rifle in the iconic, albeit increasingly less common, 5.45x39mm cartridge. This upper assembly boasts a 16-inch barrel, a 12-inch M-LOK handguard for accessory attachment, and is manufactured by Moriarti, a name that, while perhaps not as widely recognized as some of the larger players, is steadily building a reputation for providing affordable AR parts. With its unique caliber and modern features, it piqued my interest as a potential addition to my AR platform, offering a distinct shooting experience.
My interest in the Moriarti AR-74 upper stemmed from a desire to diversify my AR collection and experience the unique ballistic characteristics of the 5.45x39mm round. Having spent considerable time with the ubiquitous 5.56 NATO, I wanted to explore the flatter trajectory and terminal performance reported by many 5.45 enthusiasts.
Upon unboxing, the upper assembly felt solid and well-constructed. The matte black finish appeared even, and the M-LOK handguard was securely attached. The weight, listed at 56 oz, felt balanced and reasonable for a 16-inch barreled upper.
Compared to other uppers I own, such as a 5.56 NATO upper from Bravo Company Manufacturing and a .300 Blackout upper from Aero Precision, the Moriarti AR-74 offered a unique proposition. The BCM boasts superior fit and finish, while the Aero Precision offers a more specialized application in .300 Blackout. Ultimately, the 5.45×39 caliber and the Moriarti’s value proposition won me over.
My initial impression was one of cautious optimism. I was excited about the prospect of shooting a different caliber in my AR-15, but also aware that the Moriarti’s lower price point might indicate compromises in quality compared to higher-end options.
Real-World Testing: Putting Moriarti Moriarti AR-74 5.45X39 16in M-LOK Upper Assembly to the Test
First Use Experience
The Moriarti AR-74 upper was first tested at my local outdoor shooting range, under clear skies and mild temperatures. I mounted it on a standard AR-15 lower receiver, using a variety of 5.45x39mm ammunition, including surplus military rounds and commercially produced options. The upper cycled reliably with all ammunition tested, although some surplus rounds exhibited slightly inconsistent velocities.
In dry conditions, the M-LOK handguard provided a comfortable and secure grip, allowing for precise control during rapid firing. The A2 flash hider effectively mitigated muzzle flash, making it easier to maintain sight picture.
Installation was straightforward, requiring no specialized tools or modifications. After just a few minutes, I had the Moriarti AR-74 upper installed and ready to shoot.
Extended Use & Reliability
After several months of use, the Moriarti AR-74 upper has proven to be a reliable and functional addition to my AR platform. I have put several hundred rounds through it, and experienced only minor hiccups related to ammunition inconsistencies rather than the upper itself. The finish has held up well, with only minor wear marks on the ejection port cover and charging handle.
Periodic cleaning and lubrication have been sufficient to maintain optimal performance. Disassembly for cleaning is straightforward, similar to any standard AR-15 upper receiver.
Compared to other AR uppers I own, the Moriarti AR-74 delivers comparable accuracy at close to medium ranges. However, the quality of the included A2 flash hider is significantly less than high-end flash hiders such as those made by Surefire.
Breaking Down the Features of Moriarti Moriarti AR-74 5.45X39 16in M-LOK Upper Assembly
Specifications
- Caliber: 5.45x39mm, offering a unique shooting experience compared to the more common 5.56 NATO. This caliber is known for its flat trajectory and decent terminal ballistics.
- Barrel Length: 16 inches, providing a good balance between maneuverability and ballistic performance. The 16-inch length ensures that the 5.45x39mm round achieves optimal velocity and energy.
- Barrel Profile: Medium, striking a balance between weight and rigidity. This profile helps to maintain accuracy even during sustained fire.
- Gas System Length: Carbine Length, providing reliable cycling with a wide range of ammunition. The carbine length gas system is a proven design that has been widely used in AR-15 platforms.
- Barrel Twist Rate: 1-8, stabilizing a wide range of 5.45x39mm bullet weights. This twist rate is optimal for achieving accurate shots with different types of 5.45 ammunition.
- Threads per Inch: 1/2×28, allowing for the attachment of a variety of muzzle devices. This thread pitch is common for AR-15 platforms, expanding the options for customizing the upper.
- Muzzle Device: A2 Flash Hider, effectively mitigating muzzle flash and reducing felt recoil. The A2 flash hider is a standard muzzle device that is simple and functional.
- Finish: Matte Black, providing a durable and corrosion-resistant coating. The matte black finish blends well with most AR-15 lower receivers.
- Color: Black, matching most standard AR-15 components. The black color provides a uniform and professional appearance.
- Gun Model: AR-15, ensuring compatibility with standard AR-15 lower receivers. This designation ensures easy installation and use on existing AR platforms.
- Fabric/Material: 4150 Chrome Moly Vanadium, ensuring durability and long-lasting performance. This steel alloy is known for its strength, heat resistance, and ability to withstand repeated stress.
- Handguard Length: 12 inches, providing ample space for mounting accessories. The 12-inch M-LOK handguard provides a comfortable grip and versatile attachment options.
- Gun Make: AR Platform, confirming compatibility with AR-style rifles and pistols. The AR platform is highly modular and adaptable, making it easy to customize and configure.
- Weight: 56 oz, balancing maneuverability and stability. This weight is typical for an AR-15 upper receiver with a 16-inch barrel.
- Magazine Included: No, requiring the use of compatible 5.45x39mm magazines. This exclusion necessitates the purchase of separate magazines designed for the 5.45x39mm round.
Performance & Functionality
The Moriarti AR-74 upper performs admirably for its price point. Accuracy is acceptable, with consistent groupings at 100 yards when using quality ammunition.
Reliability is excellent, with the upper cycling reliably through various ammunition types. However, as mentioned above, the A2 flash hider is a weakness, not performing nearly as well as higher-end options.
The upper meets expectations for a budget-friendly option, providing a reliable and functional 5.45x39mm shooting experience. However, those seeking match-grade accuracy or top-tier components may need to consider higher-priced alternatives.
Design & Ergonomics
The build quality is adequate, with acceptable fit and finish for the price. The M-LOK handguard is comfortable to grip and provides ample space for mounting accessories.
The upper is user-friendly, with no significant learning curve. Installation and disassembly are similar to any standard AR-15 upper receiver.
Durability & Maintenance
The 4150 Chrome Moly Vanadium barrel should provide a long service life with proper maintenance. The matte black finish appears durable, but some wear is expected with extended use.
Cleaning and maintenance are straightforward, requiring only basic AR-15 cleaning tools and supplies. Regular lubrication of the bolt carrier group and other moving parts is recommended.
Accessories and Customization Options
The Moriarti AR-74 upper is compatible with a wide range of AR-15 accessories, including optics, lights, and grips. The M-LOK handguard provides ample space for mounting these accessories.
The 1/2×28 threaded barrel allows for the attachment of various muzzle devices, such as suppressors and compensators. Upgrading the existing A2 flash hider to something better is definitely recommended.
Pros and Cons of Moriarti Moriarti AR-74 5.45X39 16in M-LOK Upper Assembly
Pros
- Affordable price point, making it accessible to budget-conscious AR enthusiasts.
- Reliable cycling with various 5.45x39mm ammunition types.
- M-LOK handguard provides ample space for mounting accessories.
- Durable 4150 Chrome Moly Vanadium barrel.
- Unique 5.45x39mm caliber offers a different shooting experience.
Cons
- The included A2 flash hider is of low quality.
- Fit and finish may not be as refined as higher-end uppers.
- Requires the purchase of separate 5.45x39mm magazines.
Who Should Buy Moriarti Moriarti AR-74 5.45X39 16in M-LOK Upper Assembly?
The Moriarti AR-74 upper is perfect for AR-15 enthusiasts looking to experiment with the 5.45x39mm caliber without breaking the bank. It is also well-suited for shooters who prioritize affordability and reliability over premium features and fit and finish.
This product might not be the best choice for competitive shooters or those seeking match-grade accuracy. Also, those who demand top-tier components and flawless fit and finish should consider higher-end options from more established manufacturers.
A must-have accessory is a set of high-quality 5.45x39mm magazines. Also, replacing the included A2 flash hider with a more effective muzzle device is highly recommended.
Conclusion on Moriarti Moriarti AR-74 5.45X39 16in M-LOK Upper Assembly
The Moriarti Moriarti AR-74 5.45X39 16in M-LOK Upper Assembly is a budget-friendly option for those looking to venture into the world of 5.45x39mm AR-15s. While it may not boast the same level of refinement as higher-end uppers, it offers reliable performance and acceptable accuracy for recreational shooting.
The price is justified for what you get: a functional and dependable 5.45x39mm upper at an accessible price point. However, immediately upgrading the A2 flash hider will greatly enhance the shooting experience.
I would recommend the Moriarti AR-74 upper to budget-conscious AR enthusiasts who want to try something different. Give the Moriarti AR-74 upper a shot and experience the unique characteristics of the 5.45x39mm cartridge for yourself!