KNS Precision M16 Non-Rotating Sear Pin Review

Let’s Talk About KNS Precision M16 Non-Rotating Sear Pin

As an outdoor and tactical gear specialist with over a decade of experience, I’ve seen my fair share of innovations and incremental improvements in firearm components. The KNS Precision M16 Non-Rotating Sear Pin is one such product that, while seemingly small, addresses a potential long-term reliability issue in M16 platforms. Manufactured by KNS Precision, this stainless steel pin is designed to prevent wear and tear on the receiver’s sear pin holes, a crucial factor for maintaining the longevity and proper function of the rifle.

What brought me to this particular sear pin was a client’s concern about the increasing wobble in their M16’s sear pin, a common issue in well-used rifles. The original pin was showing significant wear, and the holes in the receiver were starting to ovalize. I knew I needed a solution that would not only fix the immediate problem but also prevent it from recurring.

Upon opening the package, I was immediately impressed with the KNS Precision M16 Non-Rotating Sear Pin. The stainless steel construction with the phosphate finish exuded quality and durability. Its weight felt substantial, indicating a robust build, and the finish was even and well-applied.

Compared to a standard mil-spec sear pin, the KNS Precision offering is clearly a step up in terms of material and design. While a standard pin relies solely on friction and proper fit to stay in place, the KNS Precision pin incorporates a spring pin slot for enhanced retention and non-rotation. I chose this over other aftermarket options, like simple oversized pins, because it addressed the root cause of the problem – rotation and subsequent wear – rather than just patching it up.

My first impression was positive. I was excited to install it and see if it lived up to its promise of preventing further wear and improving the overall reliability of the M16.

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Real-World Testing: Putting KNS Precision M16 Non-Rotating Sear Pin to the Test

First Use Experience

I tested the KNS Precision M16 Non-Rotating Sear Pin at my gunsmithing bench and subsequently at an outdoor range. Installation was performed on a registered M16 lower receiver owned by a client. The range session involved approximately 500 rounds of mixed ammunition, from standard 55-grain FMJ to heavier 77-grain OTM rounds, fired in both semi-automatic and full-automatic modes.

The KNS Precision M16 Non-Rotating Sear Pin performed flawlessly in both dry and slightly dusty conditions. Installation required a bit more effort than a standard pin due to the tighter tolerances, but this was expected and, in my opinion, a positive sign of a precise fit. No amount of environmental factors could have reasonably affected the function of this small component.

The initial installation required a firm push to seat the takedown pin fully, and a gentle tap with a plastic mallet ensured it was locked in place. Removing the takedown pin also required a slight push with a takedown pin pusher. The sear itself moved freely and without any undue stiffness.

Extended Use & Reliability

After several weeks and approximately 2,000 rounds fired through the M16, the KNS Precision M16 Non-Rotating Sear Pin continues to perform admirably. There are no signs of wear or tear on the pin itself or the receiver. The takedown pin continues to require a firm push, indicating that the KNS Precision pin is indeed preventing rotation and subsequent loosening of the receiver holes.

Maintenance is straightforward. The pin can be cleaned with any standard gun cleaning solvent and lightly lubricated to prevent corrosion, although the stainless steel construction makes it inherently resistant to rust.

Compared to my previous experiences with standard sear pins, which often exhibit wear and contribute to receiver hole ovalization over time, the KNS Precision M16 Non-Rotating Sear Pin is a significant improvement. It offers peace of mind, knowing that the rifle’s receiver is better protected from long-term wear and tear.

Breaking Down the Features of KNS Precision M16 Non-Rotating Sear Pin

Specifications

The KNS Precision M16 Non-Rotating Sear Pin is specifically designed for the M16 platform.

• It is constructed from stainless steel for enhanced durability and corrosion resistance.
• The pin features a phosphate finish, providing additional protection and a non-reflective surface.
• It is designed to prevent rotation and wear on the receiver’s sear pin holes.
• The pin includes a spring pin slot for secure retention.
• The Manufacturer is KNS Precision, a reputable company known for high-quality firearm components.
  These specifications are critical because they directly impact the longevity and reliability of the M16. A standard sear pin, especially in high-volume or full-auto use, can wear down the receiver holes, leading to increased wobble and potential malfunctions. The KNS Precision pin addresses this issue by preventing rotation and providing a more robust, wear-resistant alternative.

Performance & Functionality

The KNS Precision M16 Non-Rotating Sear Pin excels at its primary function: preventing wear on the receiver. It ensures that the sear operates smoothly and consistently, maintaining proper function of the semi-automatic and full-automatic firing modes.

Its strength lies in its simple yet effective design. The tight tolerances and spring pin slot eliminate rotation, while the stainless steel construction ensures longevity. The only potential weakness is the slightly tighter fit during installation, but this is a minor inconvenience compared to the long-term benefits. It surpasses expectations by offering a tangible improvement in the M16’s reliability and lifespan.

Design & Ergonomics

The design is straightforward and functional. The stainless steel construction with the phosphate finish provides a durable and corrosion-resistant pin that blends seamlessly with the M16’s overall aesthetics.

Installation requires a basic understanding of M16 disassembly, but it is a relatively simple process. The tighter fit may require a bit more force, but it is a testament to the pin’s precise machining and tight tolerances.

Durability & Maintenance

Given its stainless steel construction and phosphate finish, the KNS Precision M16 Non-Rotating Sear Pin is expected to last for the lifespan of the rifle. Regular cleaning and light lubrication are sufficient to maintain its optimal performance.

The pin is easily removed and replaced with standard gunsmithing tools. Its robust design minimizes the need for frequent maintenance or repair.

Accessories and Customization Options

The KNS Precision M16 Non-Rotating Sear Pin is a standalone component and does not require any additional accessories. It is compatible with any standard M16 lower receiver and fire control group.

The pin does not inherently limit customization options for other components. It enhances the overall reliability of the M16 without interfering with other upgrades or modifications.

Pros and Cons of KNS Precision M16 Non-Rotating Sear Pin

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Who Should Buy KNS Precision M16 Non-Rotating Sear Pin?

This product is perfect for:

• M16 owners who want to proactively protect their rifle’s receiver from wear and tear.
• Gunsmiths and armorers who want to offer a reliable upgrade to their clients.
• Owners of registered M16s who want to preserve the value and functionality of their investment.

Who should skip this product?

• Individuals who own AR-15s or other semi-automatic rifles, as this product is specifically designed for the M16 platform.
• Those who are unwilling to spend a slightly higher price for a more durable and reliable sear pin.

A must-have modification would be to apply a thin layer of grease to the receiver’s pin holes to make installation easier.

Conclusion on KNS Precision M16 Non-Rotating Sear Pin

The KNS Precision M16 Non-Rotating Sear Pin is a worthwhile investment for any M16 owner who values the longevity and reliability of their rifle. Its stainless steel construction, phosphate finish, and innovative design effectively prevent wear on the receiver, ensuring smooth and consistent operation for years to come.

While the price may be slightly higher than a standard mil-spec sear pin, the added durability and peace of mind are well worth the cost. I would personally recommend it to anyone looking to upgrade their M16’s fire control group.

Don’t wait until your receiver holes are ovalized and your rifle’s reliability is compromised. Invest in the KNS Precision M16 Non-Rotating Sear Pin today and protect your investment for the long haul!