When it comes to bolt carrier groups, Nickel Boron (NiB) coatings offer a clear edge in performance, reliability, and ease of maintenance. At Mounts Plus, we stock a wide selection of Nickel Boron BCGs designed for AR-15, AR-10, and pistol-caliber carbines—all from trusted brands like Fail Zero, WMD Guns, and Spike’s Tactical.

Whether you're upgrading your build or replacing a worn-out carrier group, our NiB-coated options provide smoother cycling, less friction, and easier cleanup after high round counts. For shooters who want mil-spec quality and long-term durability, a NiB BCG is a smart investment.

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⚙️ What Is a Nickel Boron BCG?

A Nickel Boron Bolt Carrier Group is a drop-in component for your AR-pattern rifle that features a high-lubricity NiB coating on the bolt, carrier, and internal parts. This finish reduces friction, resists corrosion, and doesn’t wear off under heat or pressure—making it ideal for suppressed, high-velocity, or duty use.

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🛠️ Why Choose a NiB BCG?

• Easier to clean – carbon fouling wipes away with minimal effort

• Runs smoother – lower friction equals better cycling

• More durable – coatings last longer than phosphate or nitride

• Great for suppressors – less carbon stick means less buildup

• No need for heavy lube – NiB naturally reduces friction

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🔍 In-Stock NiB BCG Options

We carry Nickel Boron BCGs for all major calibers and platforms:

• AR-15 / M16 Full Auto NiB BCG

• AR-10 / .308 DPMS NiB Bolt Carrier Group

• 9mm NiB BCGs for PCC builds

• 6mm ARC, 6.5 Grendel, and 458 SOCOM BCGs in EXO Nickel Boron

• Fail Zero BCGs with and without hammers

• WMD NiB-X BCGs with polished finishes

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🔧 Top Brands We Carry

• Fail Zero – known for their patented EXO NiB coating

• WMD Guns – NiB-X polished finish for extreme durability

• Spike’s Tactical – AR-15 BCGs with NiB coatings

• Aero Precision, Brownells, and more

All of our BCGs are MPI-tested, properly staked, and built to mil-spec or better standards.

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🛡️ Applications

• Home defense rifles

• Duty-ready patrol rifles

• Suppressed builds

• Competition AR-15s

• Long-range AR-10s

• High-volume shooters who hate scrubbing carbon

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🧠 FAQ:

What’s the difference between Nickel Boron and phosphate coatings?

Nickel Boron provides a harder, smoother, and more corrosion-resistant finish. It doesn't absorb oil like phosphate and cleans far more easily—ideal for high-performance setups.

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Will a NiB BCG work in any AR-15?

Yes. NiB BCGs are designed to drop into any standard AR-15 upper that uses a 5.56/.223 bolt carrier group. Always confirm caliber compatibility before ordering.

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Do I still need to lubricate a NiB BCG?

Yes, but not nearly as much. The NiB coating reduces the need for heavy lube, making it perfect for dirty or suppressed environments.

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Is Nickel Boron better than nitride?

It depends on the use case. NiB is slicker and easier to clean, while nitride is often more affordable and corrosion-resistant. For performance builds, many shooters prefer NiB.

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Are Fail Zero and WMD good brands for BCGs?

Absolutely. Both are industry leaders in Nickel Boron coatings. Fail Zero's EXO and WMD's NiB-X finishes are highly respected among AR builders and professionals.

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💥 Get Your Nickel Boron BCG Today

All our NiB bolt carrier groups are in stock and ready to ship. Whether you're building your dream AR or upgrading your duty rifle, this is the last BCG you'll need for years of reliable use.

Fast shipping. Trusted brands. Built to run.