Fail Zero M16/M4 Full-Auto BCG – EXO Nickel Boron
Not Yet Rated | Write the First Review SKU: 222-FAI-FZ-M164-01-SAH
UPC: 881315000000
MFG#: FZ-M164-01-SAH

Fail Zero M16/M4 Full-Auto BCG – EXO Nickel Boron | 5.56/.223/300 BLK Compatible

Full-Auto Rated. Friction-Free Cycling. Fail Zero Reliability.

The Fail Zero M16/4 Full-Auto BCG is a high-performance, drop-in bolt carrier group engineered for M16, M4, and AR-15 platforms. Whether you're running full-auto, suppressed, or simply pushing high round counts, this mil-spec BCG delivers battle-ready durability, enhanced cycling, and cleaner operation—shot after shot.

Coated with Fail Zero’s patented EXO Nickel Boron (NiB) technology, this carrier group offers permanent dry lubricity, extreme wear resistance, and a low-friction surface that runs cooler, cleaner, and longer than standard phosphate or nitride carriers.

⚙️ Key Features:

• ✅ Drop-In Fit for M16, M4, and AR-15 Upper Receivers

• ✅ Full-Auto Rated M16 Cut Carrier – Compatible with select-fire and semi-auto platforms

• ✅ EXO Nickel Boron Coating on All Critical Components – Friction-free performance, easy cleaning

• ✅ Nickel Boron Treated Parts Include:

  • Bolt & Extractor (5.56 NATO / .223 Rem / 300 BLK)

  • Bolt Carrier

  • Cam Pin

  • Carrier Key

  • Firing Pin

• ✅ Corrosion & Heat Resistant – Ideal for suppressed or high-round-count rifles

• ✅ No Lube Required – Runs dry or with minimal lubrication

• ✅ Fully Assembled & Test-Fired – Ready for immediate installation

🔫 Built for Duty, Defense & High-Performance Shooting

Whether you're running a duty rifle, prepping for competition, or building a top-tier tactical AR, the Fail Zero M16/4 Full-Auto BCG provides the enhanced reliability and lower maintenance you expect from a professional-grade bolt carrier group.

The EXO Nickel Boron coating not only makes cleaning a breeze, but also provides smoother cycling and less internal wear—ensuring your rifle stays in the fight, round after round.