FailZero AR-15 Bolt Carrier Group, 5.56mm Black

FailZero AR-15 Bolt Carrier Group

This is a complete, fully assembled bolt carrier group engineered for the modern AR-15 platform. It arrives ready to drop into any mil-spec AR-15 upper receiver without additional fitting or modification.

Superior Coating Technology

Every critical component receives FailZero's proprietary EXO Nickel Boron coating. This advanced surface treatment delivers permanent dry lubricity—meaning your rifle runs cleaner and requires less maintenance. The coating also provides exceptional durability and significantly increases both wear and corrosion resistance, extending the service life of your firearm.

Complete Component Package

The group includes:

• Bolt and extractor (fully compatible with 5.56mm and .223 Remington ammunition)
• Bolt carrier
• Cam pin
• Carrier key
• Firing pin

Reliability You Can Count On

Whether you're building a new rifle, upgrading an existing platform, or maintaining your current setup, this bolt carrier group delivers the reliability and performance serious shooters demand. The EXO coating means fewer cleaning sessions and more time at the range.