Moriarti AR-15 Hammer Spring Review

First Impressions of Moriarti AR-15 Hammer Spring

The Moriarti AR-15 Hammer Spring might seem like a mundane component, easily overlooked in the grand scheme of an AR-15 build or upgrade. However, after a decade of tinkering with AR platforms, I’ve learned that even the smallest parts can drastically impact performance. This particular hammer spring from Moriarti caught my eye due to its incredibly low price point, sparking my curiosity about its quality and functionality. Could such an inexpensive part truly deliver reliable performance?

I’ve always been a proponent of building my ARs from the ground up, hand-selecting each component. The reason is to ensure compatibility and achieve a specific level of performance. A consistent trigger pull is critical for accuracy. I needed a hammer spring that would reliably ignite primers without causing excessive trigger pull weight or inconsistency.

Upon receiving the Moriarti AR-15 Hammer Spring, my initial impression was neutral. It’s a hammer spring, after all. Visually, it appeared to be a standard steel spring with a black finish. Compared to hammer springs from more premium brands like Geissele or JP Enterprises, the Moriarti spring lacked any immediately noticeable distinguishing features. I’ve used Colt and Brownells springs in the past, which felt slightly sturdier.

I chose the Moriarti AR-15 Hammer Spring over others primarily due to its price. Given the nature of hammer springs – simple coiled pieces of metal – I was willing to take a chance on a budget option to see if it could perform adequately. My first thought was whether it would maintain its spring rate over time. Would it cause light strikes on primers?

Honestly, my first impression was cautiously optimistic. The spring looked like it would function, and the low price made it worth experimenting with. The true test would come with live fire.

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Real-World Testing: Putting Moriarti AR-15 Hammer Spring to the Test

First Use Experience

My first test of the Moriarti AR-15 Hammer Spring took place at my local outdoor shooting range. I installed the spring into a lower receiver I was building for a lightweight AR-15 project. This build was intended for recreational target shooting and the occasional varmint hunt.

The conditions were fairly mild, with temperatures in the mid-60s and a slight breeze. I ran approximately 200 rounds through the rifle, using a mix of .223 Remington and 5.56 NATO ammunition from various manufacturers, including Winchester, Federal, and PMC. I wanted to test its reliability with different primer hardness.

Initially, the Moriarti AR-15 Hammer Spring performed flawlessly. The trigger pull felt consistent, and I experienced no failures to ignite any of the primers. I did notice, however, that the trigger pull weight felt slightly heavier than with the enhanced springs I typically use. This wasn’t necessarily a negative, but it was noticeable.

Extended Use & Reliability

After several months of regular use, including multiple range trips and a couple of varmint hunts, the Moriarti AR-15 Hammer Spring has held up reasonably well. I’ve put approximately 1000 rounds through the rifle since installing the spring. There have been no failures to fire.

I haven’t noticed any significant signs of wear and tear. The spring still appears to be in good condition, with no visible corrosion or deformation. I regularly clean and lubricate my firearms, so the hammer spring receives a light coating of oil during maintenance.

Compared to my previous experiences with higher-end hammer springs, the Moriarti spring has performed adequately, but not exceptionally. The trigger pull weight has remained consistent, but it still feels slightly heavier than I prefer for precision shooting. For a budget-friendly option, however, it gets the job done.

Breaking Down the Features of Moriarti AR-15 Hammer Spring

Specifications

The Moriarti AR-15 Hammer Spring is a standard AR-15 hammer spring made from steel. It is designed to fit any mil-spec AR-15 lower receiver. The finish is a simple black coating, likely to prevent rust and corrosion.

• Manufacturer: Moriarti.
• Color: Steel (Black Finish).
• Gun Type: Rifle.
• Gun Make: AR Platform.
• Fabric/Material: Steel.

These specifications are important because they dictate compatibility and expected lifespan. The steel construction ensures durability and resistance to wear, while the mil-spec dimensions guarantee it will fit in a wide range of AR-15 rifles. The black coating provides basic corrosion resistance.

Performance & Functionality

The Moriarti AR-15 Hammer Spring functions as intended. It provides the necessary force to strike the firing pin and ignite primers reliably. However, it’s important to note that it may result in a slightly heavier trigger pull compared to enhanced or lighter hammer springs.

• Strengths: Reliable primer ignition, low cost.
• Weaknesses: Potentially heavier trigger pull.

The spring meets expectations for a basic, functional hammer spring. It’s not designed for competition shooters or those seeking a match-grade trigger pull, but it’s perfectly adequate for general-purpose AR-15 builds.

Design & Ergonomics

The build quality is acceptable for the price. The spring is made from steel and appears to be well-coiled and tempered. The black finish is even and provides some protection against corrosion.

• User-Friendly? Yes, installation is straightforward and requires no special tools. It is a drop-in replacement for the original spring.

There’s no real learning curve. It’s a simple, functional component with no complicated design features.

Durability & Maintenance

The steel construction suggests reasonable longevity. Proper maintenance, including regular cleaning and lubrication, will extend its lifespan.

• Easy to maintain & repair? It requires no repair. Cleaning it is as simple as wiping it down with a lightly oiled cloth.

Given its simplicity, there’s little that can go wrong with the Moriarti AR-15 Hammer Spring, provided it’s properly installed and maintained.

Accessories and Customization Options

The Moriarti AR-15 Hammer Spring doesn’t come with any accessories. It’s a standalone component.

• It’s compatible with a wide range of AR-15 trigger groups and lower receiver parts.

You can pair it with different triggers, disconnector springs, and safety selectors to customize the feel of your AR-15 trigger. Pairing it with a lighter trigger spring can help reduce the overall trigger pull weight.

Pros and Cons of Moriarti AR-15 Hammer Spring

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Who Should Buy Moriarti AR-15 Hammer Spring?

The Moriarti AR-15 Hammer Spring is perfect for budget-conscious builders, recreational shooters, and those assembling a basic AR-15 for general use. It’s ideal for individuals who prioritize functionality and affordability over premium features or a highly refined trigger pull.

• It’s great for those building plinking rifles or backup ARs.

Those seeking a match-grade trigger pull or ultra-light trigger feel should skip this product. Consider investing in a higher-end hammer spring from a reputable manufacturer like Geissele or JP Enterprises.

• A must-have accessory is a quality trigger pull gauge to measure and fine-tune the trigger pull weight.

Conclusion on Moriarti AR-15 Hammer Spring

The Moriarti AR-15 Hammer Spring is a functional and affordable option for builders on a budget. While it may not offer the refined trigger pull of more expensive springs, it reliably ignites primers and provides adequate performance for general-purpose AR-15 builds.

• The price is certainly justified, given its functionality and durability.

I would recommend it to anyone building a basic AR-15 or needing a replacement hammer spring without breaking the bank. It is a good starting point, especially if paired with other enhanced trigger components.

Ultimately, the Moriarti AR-15 Hammer Spring proves that you don’t always need to spend a fortune to get a functional and reliable AR-15 component. If you’re looking to save money without sacrificing essential performance, this spring is worth considering. Give your AR-15 build a chance with this affordable and reliable hammer spring!