WMB AR-15 Full Auto BCG – NiB-X Black Nickel Boron Polished
Not Yet Rated | Write the First Review SKU: 222-WMD-NIBXBCG0001-BLK
UPC: 856000000000
MFG#: NIBXBCG0001-BLK

Looking for a bolt carrier group that looks as tough as it performs? The WMD Guns AR-15/M16/M4 Full Auto BCG, finished in NiB-X® Black Nickel Boron, delivers next-level performance in a sleek, polished black finish designed for hard use and easy maintenance.

This is the black-coated, full auto bolt carrier group serious shooters turn to when they want durability, reliability, and a finish that cleans up fast after a long day at the range or in the field.

🧱 Engineered for Reliability Under Fire

Every component of this BCG is built to mil-spec standards or better, starting with an 8620 steel carrier and 9310 bolt, then enhanced with WMD’s signature NiB-X® Black finish—a dual coating process that adds extreme hardness, lubricity, and corrosion resistance.

• Compatible with AR-15, M16, and M4 platforms

• Designed for 5.56 NATO / .223 Rem rifles

• Fully full-auto rated for suppressed or high-cycle builds

• Polished black finish for a clean, aggressive look

⚙️ What’s Inside the NiB-X® Black BCG

🧼 Easier to Clean. Built to Last.

Nickel Boron is known for its smoothness and wear resistance—our NiB-X® Black takes it even further by adding a corrosion-resistant black topcoat. That means less carbon buildup, easier cleaning, and a BCG that keeps running long after others fail.

✅ Perfect for:

• AR-15 builders looking for a high-performance black BCG

• Shooters running suppressed or high round-count setups

• Fans of low-maintenance, easy-to-clean components

• Anyone who values premium coatings and materials

🧠 FAQ

Will this BCG work in my AR-15?

Yes. This full auto BCG is fully compatible with AR-15, M4, and M16 platforms using 5.56 NATO or .223 Remington.

Is this BCG full auto rated?

Absolutely. It’s a full-auto profile carrier, fully heat-treated and designed for high-performance builds including full-auto or suppressed setups.

What’s the benefit of the NiB-X Black coating?

The dual-layer NiB-X Black Nickel Boron coating provides:

• Lower friction for smoother cycling

• Increased hardness for wear resistance

• Corrosion protection

• Easier cleaning compared to phosphate or nitride

Is the bolt MPI tested?

Yes. The 9310 steel bolt is magnetic particle inspected (MPI) and shot-peened, ensuring superior strength and longevity under stress.

Does this include all internal components?

Yes. This is a complete bolt carrier group, including the carrier, bolt, gas key (properly staked), cam pin, firing pin, and extractor—all ready to drop in and run.

🔒 Upgrade Once – Never Look Back

The AR-15 NiB-X® Black BCG isn’t just a coating gimmick — it’s a real-world upgrade in both performance and function. Whether you’re upgrading your current build or sourcing parts for a premium rifle, this BCG is designed to outperform and outlast.

✅ In stock and ships fast
✅ Built in the USA by WMD Guns
✅ Backed by performance-driven design & materials