Product Description The Bushmaster Bolt Carrier Group in Chrome Lined Phosphate finish is a premium drop-in replacement assembly engineered for reliable performance in AR-15 platform rifles. Compatible with 5.56 NATO, .223 Rem, and 300 BLK calibers, this bolt carrier group delivers versatility across a wide range of shooting applications. The chrome-lined interior provides superior corrosion resistance and enhanced durability, while the matte phosphate exterior finish adds an additional layer of protection against wear and the elements. Whether you&';re building a new AR-15 or upgrading an existing one, this Bushmaster BCG is a dependable choice backed by a trusted firearms manufacturer. Product Highlights Multi-Caliber Compatibility: Supports 5.56 NATO, .223 Rem, and 300 BLK for maximum versatility across AR-15 builds. Chrome-Lined Interior: Provides exceptional corrosion resistance and reduces friction for smoother cycling and easier cleaning. Phosphate Exterior Finish: Matte black phosphate coating offers added protection against wear, rust, and environmental exposure. AR-15 Platform Fit: Designed as a direct drop-in replacement for standard AR-15 bolt carrier group assemblies. Bushmaster Quality: Manufactured by Bushmaster, a long-established name in the AR-15 Rifle Series, ensuring reliable cycling and consistent performance. Specs Brand: Bushmaster Model: AR-15 Bolt Carrier Group Manufacturer Part Number (MPN): F1002891 UPC: 604206200082 Caliber/Gauge: 5.56 NATO / .223 Rem / 300 BLK Firearm Fit: AR-15 Color: Black Finish: Chrome Lined Phosphate Family: AR-15 Rifle Series Type: Bolt Carrier Group / Bolt Assembly 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. ]]>