American Built Arms Company Pro 5.56mm Cam Pin Review

Let’s Dive into American Built Arms Company Pro 5.56mm Cam Pin

The American Built Arms Company Pro 5.56mm Cam Pin is a seemingly small, yet crucial component in the AR-15 platform, often overlooked but vital for reliable cycling. American Built Arms Company (A*B Arms) positions this cam pin as a high-quality, Mil-Spec compliant upgrade, featuring a Nickel Boron coating for enhanced lubricity and durability. Having spent over a decade building and maintaining AR-15 rifles for various applications, from competition to defense, I’ve learned that even the smallest parts can have a significant impact on performance, and I was eager to see if this cam pin lived up to the hype.

My interest in this product stemmed from a desire to improve the smoothness and reliability of a particularly finicky AR-15 build that I used primarily for 3-gun competitions. I was experiencing intermittent failures to extract, and while I addressed other potential causes like the extractor spring and gas system, I suspected the cam pin might also be contributing due to wear on the original part. The American Built Arms Company Pro 5.56mm Cam Pin‘s Nickel Boron coating promised a smoother action and reduced friction, which seemed like a potential solution.

Upon receiving the cam pin, I was immediately impressed by its clean machining and flawless finish. The Nickel Boron coating gave it a slick, almost polished look, and it felt noticeably smoother than the standard phosphate-coated cam pins I was accustomed to. Compared to cam pins from other manufacturers like Bravo Company MFG (BCM) or Daniel Defense, which are typically phosphate or nitride finished, the A*B Arms pin appeared to be a step above in terms of surface treatment. I chose this particular cam pin based on American Built Arms Company‘s reputation for producing high-quality bolt and extractor components, hoping that their expertise would translate to a superior cam pin as well.

My first impression was definitely positive; the quality seemed evident, and I was excited to install it and see if it made a difference in the rifle’s performance. A small part can make a big difference.

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Real-World Testing: Putting American Built Arms Company Pro 5.56mm Cam Pin to the Test

First Use Experience

My initial testing of the American Built Arms Company Pro 5.56mm Cam Pin took place at my local shooting range, during a practice session for an upcoming 3-gun match. I installed the cam pin in my competition rifle, which is chambered in 5.56mm NATO and sees a high volume of fire. The weather was typical for early summer – warm and dry, with temperatures hovering around 80 degrees Fahrenheit.

During the first few magazines, I immediately noticed a smoother cycling action. The bolt carrier group seemed to move with less resistance, and the rifle felt more responsive overall. There were no failures to extract or any other malfunctions during the initial testing, which consisted of approximately 200 rounds of various types of ammunition, including both brass and steel-cased rounds.

Extended Use & Reliability

After several months of consistent use, the American Built Arms Company Pro 5.56mm Cam Pin has held up exceptionally well. I’ve put approximately 2,000 rounds through the rifle since installing it, including several more 3-gun matches and numerous practice sessions. The Nickel Boron coating shows no signs of wear, and the cam pin continues to function flawlessly.

Maintaining the cam pin is simple; I clean it along with the rest of the bolt carrier group after each shooting session. A quick wipe down with a solvent and a light application of lubricant is all it takes to keep it in top condition. Compared to my previous experiences with standard cam pins, the American Built Arms Company version definitely outperforms in terms of smoothness and ease of maintenance.

Breaking Down the Features of American Built Arms Company Pro 5.56mm Cam Pin

Specifications

The American Built Arms Company Pro 5.56mm Cam Pin is specifically designed for AR-15 rifles chambered in 5.56mm NATO. It is manufactured to Mil-Spec dimensions, ensuring compatibility with most standard bolt carrier groups. The cam pin is constructed from E4340 steel, which is then heat-treated per Mil-Spec requirements for exceptional strength and durability.

The most significant feature is the Nickel Boron (NiB) coating, which provides a low coefficient of friction and enhances corrosion resistance. These specifications matter because they directly impact the reliability and longevity of the rifle. A properly dimensioned and heat-treated cam pin made from high-quality steel ensures proper function and prevents premature wear. The NiB coating reduces friction, resulting in smoother cycling and improved reliability, especially under harsh conditions.

Performance & Functionality

The American Built Arms Company Pro 5.56mm Cam Pin performs its job exceptionally well. It ensures smooth and reliable unlocking and locking of the bolt carrier group, contributing to consistent cycling of the rifle. Its strengths lie in its high-quality construction and NiB coating, which significantly reduce friction and improve overall performance.

There are no discernible weaknesses; the cam pin has consistently performed flawlessly in all conditions. It definitely meets and even exceeds my expectations, offering a noticeable improvement over standard cam pins.

Design & Ergonomics

The American Built Arms Company Pro 5.56mm Cam Pin features a simple, yet effective design. The dimensions are precise, and the surface finish is excellent. Its build quality is top-notch, and the NiB coating gives it a smooth, almost frictionless feel.

There is no learning curve associated with using the cam pin; it is a direct replacement for the factory part and requires no special tools or skills to install.

Durability & Maintenance

Based on my experience, the American Built Arms Company Pro 5.56mm Cam Pin is built to last. The heat-treated E4340 steel construction and NiB coating provide excellent durability and resistance to wear and corrosion. It requires minimal maintenance; regular cleaning and lubrication are sufficient to keep it in top condition.

Accessories and Customization Options

The American Built Arms Company Pro 5.56mm Cam Pin is a stand-alone component and does not require any specific accessories. However, it is a great complement to other upgraded bolt carrier group components, such as a Nickel Boron coated bolt carrier or bolt. The cam pin is compatible with all standard AR-15 bolt carrier groups and does not require any modifications to the rifle.

Pros and Cons of American Built Arms Company Pro 5.56mm Cam Pin