Product Description The FailZero AR-15 Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil-spec AR-15 upper receivers. All critical parts are coated with FailZero&';s EXO Nickel Boron technology to provide permanent dry lubricity, extreme durability, and enhanced wear and corrosion resistance, helping promote smoother cycling and easier maintenance. This model features a black finish and a no-hammer configuration. Product Highlights Fully assembled AR-15 bolt carrier group for quick drop-in installation EXO Nickel Boron coated critical parts for permanent dry lubricity Designed to increase wear resistance and corrosion resistance for long service life Extreme durability coating helps reduce friction for smoother operation and easier cleaning Black finish with no-hammer configuration Specs Brand: FailZero Product Type: AR-15 Bolt Carrier Group (BCG) Configuration: No Hammer Coating/Finish: EXO Nickel Boron (Nickel Boron treated), Black finish Compatibility: Most mil-spec AR-15 upper receivers Manufacturer Part Number: FZ-AR15-01-NH-BLACK UPC: 094920143060 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.