Nickel boron black is a specialized coating applied to bolt carrier groups (BCGs) and other firearm components. Combining the durability and lubricity of nickel boron with a sleek black finish. This coating enhances hardness, corrosion resistance, and smooth operation while offering a distinctive appearance. Nickel boron black is commonly used on AR-15 and AR-10 BCGs, bolts, hammers, triggers, and small internal parts, making them popular for reliable performance, easy cleaning, and long lasting protection in demanding environments.
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