Engineered for consistent function across varied conditions, the FailZero FZ BASIC SEMI KIT BOLT & HAMMER promotes reliable operation. Built with aligned components and careful tolerances, the FailZero FZ BASIC SEMI KIT BOLT & HAMMER supports smooth mechanical behavior.\n\nDeveloped for shooters who value predictable performance during regular practice, the FailZero FZ BASIC SEMI KIT BOLT & HAMMER offers practical handling. Known for its reputation in reliability and product development, FailZero delivers excellence.\n\n- Manufacturer: FailZero\n- Model: AR-15 Carrier\n- Product Type: Bolt Carrier Group\n- Mounting System: Fits AR-15\n- Material: Nickel Boron Coated\n- Unique Features: EXO Nickel Boron technology, Extreme durability, Dry lubricity, Corrosion resistant\n- What's In The Box: FailZero AR15 Bolt Carrier Group w/ Hammer