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Fail Zero BCG – EXO Nickel Boron Bolt Carrier Groups for AR15, M16, M4 & More
Fail Zero BCG – EXO Nickel Boron Bolt Carrier Groups for AR-15, M16 & M4
Reliable, Battle-Tested BCGs Built to Run Clean and Smooth
Whether you're upgrading a duty rifle, tuning a competition build, or assembling a home defense AR, Fail Zero Bolt Carrier Groups (BCGs) deliver unmatched performance, longevity, and ease of maintenance. Featuring Fail Zero’s patented EXO™ Nickel Boron (NiB) coating, these BCGs cycle smoother, clean easier, and run cooler — even under hard use.
At Mounts Plus, we offer the full lineup of Fail Zero BCGs including models for:
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AR-15 (5.56/.223)
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M16 and M4 platforms
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Specialty calibers: 9mm, .308, 7.62x39, 6.5 Grendel, 6mm ARC, .450 Bushmaster, 458 SOCOM, and more
🔧 Why Choose a Fail Zero BCG?
Fail Zero is a leader in bolt carrier group innovation, offering unmatched durability and performance with their exclusive EXO Nickel Boron finish.
| Benefit | Stock Upgrade | Factory Stock |
|---|---|---|
| Folding Capability | ✅ Yes | ⚠️ Limited |
| Weight Optimization | ✅ Available | ❌ Heavier |
| Aftermarket Compatibility | ✅ Mil-Spec | ❌ Proprietary |
| Improved Ergonomics | ✅ Enhanced | ⚠️ Basic |
🔒 EXO is harder than chrome, making Fail Zero BCGs ideal for high-round-count users who want worry-free reliability.
⚙️ Product Options Available
Choose from the complete Fail Zero lineup:
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Fail Zero AR15/M16 Full-Auto BCG – Nickel Boron
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Fail Zero 9mm BCG – Black Nitride
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Fail Zero 6.5 Grendel & 6mm ARC BCGs
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Fail Zero 7.62x39, .450 Bushmaster, 458 SOCOM
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AR-10 / .308 BCGs with NiB finish
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Versions with and without hammers
Each BCG includes: carrier, bolt, cam pin, firing pin, retaining pin, and properly staked gas key.
🔥 Fail Zero BCG Benefits in Real-World Use
Fail Zero BCGs are trusted by:
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Competitive shooters – for smoother, faster cycling
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Law enforcement – for duty use and long-term durability
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Hunters and recreational shooters – for low-maintenance reliability
“One of the cleanest-running BCGs I’ve used. After 500+ rounds, still smooth as butter and barely any buildup.” – Verified Customer
“Fail Zero is now my go-to for every AR build. Easy to clean and never jams.” – ARBuilderTX
🛠️ Compatible Platforms & Calibers
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AR-15 / M16 / M4
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AR-10 / DPMS / .308
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9mm AR builds
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Exotic calibers: 6.5 Grendel, 6mm ARC, 7.62x39, 458 SOCOM, 450 Bushmaster
All products are mil-spec or better and are precision-machined from top-grade materials.
📦 Why Buy from Mounts Plus?
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✅ In-stock and ready to ship fast
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🔐 Secure checkout & tracking
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💬 U.S.-based expert support
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🧰 Trusted by builders, LE, and competitive shooters
Looking for advice on the best Fail Zero BCG for your setup? Contact our team for expert help.
🔄 Related Accessories
❓ FAQs – Fail Zero Bolt Carrier Groups
Q: Are Fail Zero BCGs full-auto rated?
Yes. All AR15/M16 models are full-auto profile and built to mil-spec standards.
Q: Can I use steel case ammo with a Fail Zero BCG?
Absolutely. The EXO coating resists fouling and makes extraction smoother, even with lower-quality ammo.
Q: Do I still need to oil a NiB BCG?
A light coat is recommended, but Fail Zero BCGs are self-lubricating and require less oil than standard BCGs.
Q: Is EXO better than chrome or nitride?
EXO Nickel Boron is harder than chrome and offers superior wear and corrosion resistance compared to phosphate or nitride coatings.
🛒 Get Your Fail Zero BCG Today
Upgrade your rifle with a Fail Zero BCG and experience smoother cycling, easier maintenance, and better long-term performance.