The FailZero 5.56mm bolt carrier group is a complete AR-15 bolt carrier assembly intended for installation in most mil-spec M16/M4/AR-15 uppers. It features a steel construction, black nitride finish, and a chrome-finished firing pin. The no-hammer design and ready-to-install configuration provide a straightforward component option for compatible platforms.

Key Specifications

• The product type is a complete AR-15 bolt carrier group.
• The listed chambering is 5.56mm.
• The finish is black nitride.
• The construction material is steel.
• The model designation is M16/M4.
• The assembly is designed for installation in most mil-spec M16/M4/AR-15 uppers.
• The firing pin features a chrome finish.
• The listed design feature is no hammer.
• The listed dimensions are 1.75 x 3.80 x 10.95 inches.
• The listed weight is 0.81 pounds.

With its defined 5.56mm configuration, durable nitride finish, steel construction, and included chrome-finished firing pin, this FailZero bolt carrier group is a practical choice for maintaining or upgrading a compatible AR-15 platform.