FailZero Lightweight BCG – 5.56mm EXO Nickel Boron

Description

The FailZero Lightweight Bolt Carrier Group is a low-mass, fully assembled BCG designed for use in mil-spec AR-15, M16, and M4 upper receivers. Critical components are treated with EXO Nickel Boron to provide dry lubricity, improved wear resistance, and easier cleaning. The reduced carrier mass—approximately a 21% reduction from a standard mil-spec carrier—promotes smoother operation and reduced felt recoil, benefits often sought by competition shooters and hunters. This unit ships ready to drop in and includes the primary components required for semi-automatic AR platforms.

Key Specifications

• The carrier achieves a 21% weight reduction compared to a standard Mil-Spec carrier.
• The carrier weighs 6.4 oz.
• The complete bolt carrier group weighs 9.2 oz.
• All critical components are finished with EXO Nickel Boron and a high polish.
• Compatible with 5.56/.223 and 300 Blackout chamberings as stated by the manufacturer.
• Designed as a drop-in solution for most mil-spec AR-15 / M16 / M4 upper receivers.
• Constructed from steel with coated components for durability and corrosion resistance.
• Includes assembled bolt, extractor, cam pin, carrier key, and firing pin.
• Intended for semi-auto operation.

For shooters seeking a lighter, lower-mass BCG with a slick, corrosion-resistant finish, this FailZero unit offers a proven balance of reduced weight and durable surface treatment. Its drop-in design and EXO Nickel Boron coating simplify maintenance while supporting quicker follow-up handling and consistent operation across mil-spec AR platforms.