WMB .308 Nickel Boron BCG – NiB-X® Polished for AR-10 & DPMS Builds
Not Yet Rated | Write the First Review SKU: 222-WMD-NIBXBCG308
UPC: 856000000000
MFG#: NIBXBCG308

When your .308 rifle needs unmatched reliability and effortless cleanup, the WMD Guns .308 NiB-X® Bolt Carrier Group delivers. Featuring a polished Nickel Boron coating, this full-profile BCG is engineered for DPMS-style LR-308 and AR-10 platforms—offering premium performance in demanding conditions.

Coated with WMD’s proprietary NiB-X® finish, this bolt carrier group offers extreme lubricity, corrosion resistance, and long-lasting wear protection, even after thousands of rounds. Whether you're running suppressed, building a duty-grade .308, or want fewer hours cleaning after a range day, this BCG is built for shooters who won’t settle.

🔧 What’s Inside the .308 NiB-X® BCG

⚙️ Why Choose a Nickel Boron BCG for Your .308?

• Smoother Cycling: Reduced friction means less wear and tear on internal components

• Easy Cleanup: NiB-X® finish sheds carbon and fouling faster than phosphate or nitride

• More Durable: Harder than chrome with better corrosion resistance

• Tested Tough: Survived a 30,000-round torture test with zero flaking or degradation

• Drop-in Ready: Fully assembled and ready to run—just lube and go

💡 Optimized for DPMS Pattern AR-10 Builds

This .308 Nickel Boron BCG is DPMS LR-308 compatible, which means it fits most AR-10 style rifles with that pattern. Not sure if your upper is DPMS-style? If the rear edge of your upper receiver is curved instead of angled, it likely follows the DPMS spec.

✅ Perfect For:

• Precision AR-10 builders

• Shooters running suppressed .308s

• Long-range and tactical rifle setups

• Users upgrading from phosphate/nitride to a cleaner, smoother BCG

• Anyone who hates scrubbing carbon buildup

📦 Included:

• Complete .308 BCG (carrier, bolt, cam pin, firing pin, gas key, extractor)

• Pre-assembled and staked per mil-spec

• 100% made in the USA

🧠 FAQ

Is this BCG compatible with AR-10 rifles?

Yes—this BCG is designed for DPMS pattern AR-10 and LR-308 rifles. It will not fit Armalite-pattern AR-10s.

What’s the benefit of Nickel Boron over phosphate or nitride?

NiB-X® provides superior lubricity, corrosion resistance, and reduced carbon fouling. It also makes cleaning your BCG much faster compared to traditional coatings.

Will this work in a suppressed rifle?

Absolutely. The smooth cycling and easy-clean properties make this BCG ideal for suppressed .308 builds.

Is the bolt magnetic particle inspected (MPI)?

Yes—the 9310 steel bolt is MPI tested and shot peened to meet durability and strength expectations for high-performance rifles.

Does this come ready to drop in?

Yes. This is a complete .308 BCG, fully assembled and ready to install in any compatible upper.

🔒 Your Last .308 BCG Upgrade

This isn’t just another bolt carrier group—it’s a performance upgrade backed by real-world durability and WMD’s proprietary NiB-X® technology. If you're serious about building or upgrading a precision .308 AR, this BCG is the foundation your rifle deserves.

✅ Ships fast
✅ Made in the USA
✅ Lifetime guarantee on NiB-X® coating