Product Description The FailZero AR-15 Bolt Carrier Group is a fully assembled, drop-in upgrade designed to fit most mil-spec AR-15 upper receivers. Built with critical components treated with FailZero&';s EXO Nickel Boron technology, this bolt carrier group is engineered to reduce friction with permanent dry lubricity while improving durability, wear resistance, and corrosion resistance. This "No Hammer" configuration is ready for straightforward installation to help keep your rifle running smoothly and reliably. Product Highlights Fully assembled AR-15 bolt carrier group for quick drop-in installation in most mil-spec upper receivers EXO Nickel Boron coating on critical parts for permanent dry lubricity and reduced friction Designed for extreme durability with enhanced wear and corrosion resistance "No Hammer" configuration (009-FZAR15-01-NH) as listed by distributors Nickel Boron / nickel-finish appearance for a clean, easy-to-maintain BCG surface Specs Brand: FailZero Product Type: AR-15 Bolt Carrier Group (BCG) Configuration: No Hammer Coating/Finish: EXO Nickel Boron (Nickel Boron) Compatibility: Fits most mil-spec AR-15 upper receivers UPC: 881314861835 Manufacturer Part Number: 009-FZAR15-01-NH 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.