Product Description The FailZero M16/M4 Bolt Carrier Group is built with high-quality components and precise manufacturing to help maintain or upgrade AR-platform rifles. Finished in black nitride for enhanced durability and long-term reliability, this complete bolt carrier group is designed as a ready-to-install assembly. This model is configured with no hammer included and is commonly listed for use in 5.56 NATO / .223 Remington AR-15/M4/M16-style platforms. Product Highlights Black nitride coated bolt carrier group designed for durability and long-term reliability Complete BCG assembly intended for M16/M4/AR-15 style rifles No-hammer configuration (hammer not included) Precision manufacturing and durable construction for consistent performance Drop-in style component for mil-spec upper receiver applications (as commonly listed) Specs Brand: FailZero Product Type: Bolt Carrier Group (BCG) Model/Platform: M16/M4 (AR-15 style) Finish/Coating: Black Nitride Color: Black Configuration: No Hammer Included UPC: 094922014283 Manufacturer Part Number: FZ-NITRIDE-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.