Product Description The One Horse M16 Nickel Boron Bolt Carrier Group (BCG) is a precision-crafted, Mil-Spec component designed for AR-15 builds chambered in 5.56 NATO/.223 Remington and .300 Blackout. Featuring a fully nickel boron-coated 9310 steel bolt and 8620 steel carrier, this BCG delivers exceptional corrosion resistance, ultra-low friction, and effortless cleaning compared to standard phosphate-coated alternatives. Its staked gas key and shot-peened bolt ensure rugged reliability through thousands of rounds, making it a top-tier upgrade or drop-in solution for any serious AR-15 build. Product Highlights Dual-Caliber Compatibility: Works seamlessly with 5.56 NATO/.223 Remington and .300 Blackout barrels for maximum versatility. Premium Nickel Boron Finish: Full nickel boron coating on all components provides superior lubricity, wear resistance, and dramatically easier cleaning. Mil-Spec Construction: Built to Military Specification standards with a staked gas key and shot-peened bolt for uncompromising reliability. Quality Materials: Precision-machined 9310 steel bolt and 8620 steel carrier for long-lasting durability and consistent performance. M16 Profile Carrier: Full M16-profile carrier compatible with semi-automatic AR-15 lower receivers for reliable cycling and extraction. Specs Brand: One Horse LLC Item: M16 Bolt Carrier Group Caliber: 5.56 NATO / .300 Blackout Color/Finish: Nickel Boron Bolt Material: 9310 Steel (Shot-Peened) Carrier Material: 8620 Steel Gas Key: Staked Construction Standard: Mil-Spec MPN: OHUBC02 UPC: 850078799098 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. ]]>