Fz Basic Semi Kit Bolt & Hammer

The FailZero Basic Semi Kit Bolt & Hammer is a complete bolt carrier group assembly engineered for drop-in installation into mil-spec AR15 upper receivers. This component represents the core of your rifle's operating system—the part that cycles ammunition, manages extraction and feed, and endures the highest stress and friction during firing cycles. The entire BCG comes fully assembled and ready for immediate use without additional gunsmithing or parts sorting.

Every critical surface on this bolt carrier group is treated with FailZero's EXO Nickel Boron coating—a hard, slick finish that bonds to the substrate at the molecular level. This coating eliminates the need for conventional lubricants while providing permanent dry lubricity, which means the BCG operates smoothly with minimal fouling accumulation. Nickel Boron also delivers exceptional corrosion resistance, a critical advantage during extended field operations, coastal environments, or storage in variable humidity conditions. The hard-wearing nature of the coating extends component lifespan by reducing wear on lugs, cam surfaces, and firing pin interfaces—areas where uncoated carriers experience measurable degradation over thousands of rounds.

This BCG is designed for shooters who demand reliability across demanding schedules: law enforcement qualification courses, tactical training blocks, military field operations, and competitive shooting events where downtime is unacceptable. The nickel boron treatment particularly benefits operators in saltwater or corrosive-environment deployments, where standard parkerized carriers deteriorate rapidly. For any shooter maintaining an AR platform rifle, the FailZero Basic Semi Kit delivers the cycling reliability and durability required for duty or precision use without premium pricing.