First Impressions of Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly
The Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly promises a compact and maneuverable AR platform. Its short barrel and included fake can offer an intriguing aesthetic, aimed at those prioritizing tight-quarters performance. I was immediately drawn to its potential as a truck gun or a highly portable personal defense weapon.
I was looking for a readily available, budget-friendly upper receiver to complete an AR pistol build. Many competitors offer similar options, but the Moriarti assembly’s price point and stated specifications piqued my interest. This seemed like a way to get into a short-barreled AR without breaking the bank.
Unboxing revealed a no-frills assembly. The finish appeared even, and the M-LOK handguard felt solid. Picking it up, I was surprised by the relatively light weight, which felt appropriate for a pistol build.
I considered options from PSA (Palmetto State Armory) and Aero Precision before settling on the Moriarti. While PSA offered similar prices, reports on their QC were mixed. Aero Precision was significantly more expensive for a similar configuration.
My first impression was cautiously optimistic. The Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly appeared to be a decent value. I was excited to see how it would perform on the range.
Real-World Testing: Putting Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly to the Test
First Use Experience
My initial testing took place at an outdoor range. I mounted the upper on a lower receiver I had built with a pistol brace. I brought a variety of 5.56 ammunition, ranging from 55-grain FMJ to 77-grain OTM rounds.
The Moriarti upper initially exhibited some cycling issues with the lighter 55-grain ammunition. This is not entirely unexpected with short-barreled ARs. After switching to heavier 62-grain and 77-grain loads, the cycling became much more reliable.
It took a few magazines to get used to the extreme muzzle blast and concussion. This is inherent to such a short barrel. There were no immediate failures, but the initial cycling issues with weaker ammunition were a concern.
Extended Use & Reliability
After several range trips and approximately 500 rounds, the Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly has become more reliable. It cycles most ammunition reliably after the initial break-in period. The finish shows minimal wear, primarily around the ejection port.
Cleaning is straightforward, like any AR-15. The bore is easily accessible, and the M-LOK handguard allows for easy attachment and removal of accessories.
Compared to a 16-inch AR, the Moriarti upper sacrifices significant ballistic performance and effective range. However, its maneuverability in close quarters is undeniable. For its intended purpose as a compact personal defense weapon, it’s been performing adequately.
Breaking Down the Features of Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly
Specifications
The Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly is chambered in 5.56mm/.223 Remington. This allows for the use of readily available ammunition. It has an overall length of 21 inches.
The barrel is 7.5 inches long, with a government profile. This short length is the primary factor in its compact size. The gas system is pistol length, necessary for reliable cycling with such a short barrel.
The barrel features a 1-7 twist rate, which is well-suited for stabilizing heavier bullets. This is important for maximizing ballistic performance from the short barrel. It has 1/2×28 threads per inch, standard for 5.56 AR-15s.
The handguard is a 7-inch free-float M-LOK design with a top Picatinny rail. This allows for versatile accessory mounting. It utilizes a standard muzzle brake and is finished in black.
The barrel is constructed from 41v50 steel, a common material for AR-15 barrels known for its durability. It uses a .750-inch gas block journal size. The assembled upper weighs just 2.15 lbs.
Notably, the bolt carrier group and charging handle are not included. This is a common cost-saving measure for budget-oriented uppers. Also, there is no magazine included with the product.
Performance & Functionality
The Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly functions as intended, providing a compact and relatively lightweight AR platform. Accuracy is acceptable for its intended purpose, with consistent groupings at 25 yards. However, longer-range accuracy suffers due to the short barrel and resulting velocity loss.
Its primary strength is its maneuverability in tight spaces. The extreme muzzle blast and concussion are significant drawbacks. While it meets the basic expectations for a budget-friendly AR pistol upper, it’s not without compromises.
Design & Ergonomics
The build quality is adequate for the price. The materials used are functional and appropriately chosen. The weight is manageable, contributing to the overall maneuverability of the pistol.
The design is simple and functional. The M-LOK handguard provides a comfortable grip and ample space for accessories. There is no significant learning curve, as it operates like any standard AR-15.
Durability & Maintenance
The Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly appears to be reasonably durable. The finish has held up well so far. Maintenance is simple, requiring standard AR-15 cleaning procedures.
Replacing parts should be straightforward, as it adheres to standard AR-15 dimensions and specifications. It is too early to say definitively how long it will last, but based on the materials and construction, it should provide a reasonable service life with proper care.
Accessories and Customization Options
The Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly is compatible with a wide range of AR-15 accessories. The M-LOK handguard readily accepts grips, lights, and lasers. The Picatinny rail allows for the mounting of various optics.
Since it uses standard AR-15 dimensions, it is compatible with most aftermarket bolt carrier groups and charging handles. The muzzle threads allow for the use of different muzzle devices, although the included fake can is permanently attached.
Pros and Cons of Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly
Pros
- Very affordable price point.
- Compact and maneuverable.
- M-LOK handguard offers versatile accessory mounting.
- 1-7 twist rate stabilizes heavier bullets.
- Lightweight design enhances portability.
Cons
- Significant muzzle blast and concussion.
- Cycling issues with some weaker ammunition.
- Bolt carrier group and charging handle not included.
Who Should Buy Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly?
The Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly is perfect for budget-conscious individuals. It is also suitable for those prioritizing a compact and easily concealable AR-15 platform. This would benefit individuals seeking a truck gun, or for close-quarters personal defense.
Those seeking optimal ballistic performance or long-range accuracy should skip this product. Shooters sensitive to recoil and muzzle blast should also consider alternatives.
A must-have accessory is a quality bolt carrier group and charging handle. An upgraded pistol brace or stock (if building as an SBR after proper NFA paperwork) can also enhance comfort and control.
Conclusion on Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly
The Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly offers a compelling value proposition for those seeking a budget-friendly entry into the world of AR pistols. It’s not without its compromises, namely the cycling issues with certain ammunition and the extreme muzzle blast. However, for its intended purpose as a compact and maneuverable personal defense weapon, it performs adequately.
The price is justified, considering the features and functionality offered. While not a premium product, it provides a functional and customizable platform at an accessible price point.
I would recommend the Moriarti AR-15 5.56/.223 7.5in Pistol Upper Assembly to those aware of its limitations. If you are looking for an inexpensive way to build an AR pistol, this is a viable option. Just be prepared for the noise and consider investing in a quality BCG and charging handle.