The Fail Zero Lightweight Bolt Carrier Group is a semi-automatic AR-15 component designed for use in most mil-spec AR-15 upper receivers. It is constructed from steel and features an EXO Nickel Boron finish on the listed components.

Key Specifications

• The product is a lightweight, semi-automatic bolt carrier group for AR-15 platforms.
• The listed size is 5.56mm, with source data also identifying 5.56/.223 compatibility.
• The bolt carrier group is constructed from steel.
• The finish is identified as EXO Nickel Boron.
• The assembly is designed for most mil-spec AR-15 upper receivers.
• The listed components include the bolt, extractor, cam pin, carrier key, and firing pin.
• The carrier is described as 21% lighter than a standard Mil-Spec carrier.
• The package is described as a fully assembled bolt carrier group.
• The source data lists compatibility with 5.56, .223, and 300 Blackout.

With its lightweight configuration, steel construction, and EXO Nickel Boron finish, this Fail Zero bolt carrier group provides a clearly specified upgrade component for compatible AR-15 builds and maintenance applications.

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