AR 15 Upper Receiver Types - 80 Percent Arms

Selecting the right bolt carrier group (BCG) coating for your AR15 upper is a crucial decision that can impact the performance, reliability, and overall longevity of your firearm. Various coatings offer different advantages, addressing factors such as durability, ease of maintenance, and friction reduction. In this guide, we explore key considerations when choosing a BCG coating for your AR15 Upper.

1. Phosphate (Parkerized) Coating: Phosphate coating, also known as Parkerizing, is a traditional and corrosion-resistant option for BCGs. It provides a matte black finish and offers good durability. While it may not be as smooth as some other coatings, it is known for its reliability and cost-effectiveness.

2. Nitride (Melonite/QPQ) Coating: Nitride coatings, often marketed as Melonite or QPQ (Quench-Polish-Quench), offer excellent hardness, corrosion resistance, and reduced friction. Nitrided BCGs have a smooth, black finish and provide enhanced wear resistance, making them a popular choice for AR15 uppers.

3. Nickel Boron Coating: Nickel Boron coatings provide a bright silver or satin finish and offer excellent corrosion resistance and lubricity. These BCGs are known for their ease of cleaning and reduced friction, contributing to smoother cycling. Nickel Boron coatings can be a great choice for those seeking low-maintenance options.

4. DLC (Diamond-Like Carbon) Coating: DLC coatings combine hardness and lubricity, offering a durable and smooth surface. BCGs with DLC coatings exhibit excellent wear resistance and reduced friction, contributing to enhanced reliability and easier cleaning. The dark gray or black appearance is another aesthetically appealing feature.

5. Titanium Nitride (TiN) Coating: Titanium Nitride coatings provide a distinctive gold appearance and offer excellent corrosion resistance. TiN coatings reduce friction, enhancing the overall smoothness of the BCG. While visually striking, they may be more susceptible to wear compared to some other coatings.

6. Cerakote Finish: Cerakote is a ceramic-based coating that provides excellent corrosion resistance and customization options. While not a traditional BCG coating, some manufacturers offer Cerakoted BCGs for added protection and a personalized appearance. Cerakote comes in a variety of colors, allowing users to match their AR15 upper to their preferences.

7. Considerations for Intended Use: When selecting a BCG coating, consider the intended use of your AR15 upper. If it’s for high round count scenarios, such as competitive shooting or training, a durable coating with enhanced wear resistance may be preferable.

8. Maintenance and Cleaning: Different coatings have varying levels of ease when it comes to maintenance and cleaning. Consider how much time and effort you are willing to invest in keeping your AR15 upper in optimal condition.

In conclusion, selecting the right BCG coating for your AR15 upper involves weighing factors such as durability, friction reduction, and personal preferences. Each coating option comes with its unique set of advantages, contributing to the overall performance and longevity of your AR15 platform.

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