Engineered for shooters who demand reliability, the FailZero FZ M16/M4 BCG NO HAMMER BLK ensures consistent performance. Built with EXO Nickel Boron technology, this Bolt Carrier Group offers extreme durability and corrosion resistance.\n\nIdeal for range training and recreational shooting, this BCG is designed to fit mil-spec M16, M4, or AR15 upper receivers. FailZero is renowned for its commitment to quality and innovation in firearm components.\n\n- Manufacturer: FailZero\n- Model: M16/M4\n- Product Type: Bolt Carrier Group\n- Material: Steel\n- Unique Features: EXO Nickel Boron Coating, Dry Lubricity, Corrosion Resistant\n- What's In The Box: Fully Assembled BCG