Product Description The TacFire AR-15/M16 Bolt Carrier Group is a premium-grade, Mil-Spec style upgrade built for reliable performance in .223 Remington, 5.56 NATO, and .300 Blackout platforms. Finished in corrosion-resistant nickel boron, this BCG is designed to deliver smooth operation, easier cleaning, and enhanced wear resistance. The carrier is machined from 8620 tool steel, the bolt is made from 9310 tool steel, and key internal components are heat treated to military specifications for dependable function. With an M16 style carrier, MPI-inspected bolt, and quality stainless steel components, this TacFire BCG is well suited for AR-platform rifle builds, replacements, and performance-focused upgrades. Product Highlights Nickel boron finish helps resist corrosion and promotes smooth cycling with easier maintenance. M16 style, full-auto compatible bolt carrier group for AR-15 and M16 platform rifles. 8620 tool steel carrier paired with a 9310 tool steel bolt for strength and long-term durability. MPI-inspected, shot-peened bolt and heat-treated components built to Mil-Spec standards. Includes premium internal parts such as a 17-4 stainless steel gas key, S-7 tool steel extractor, and 17-4 stainless steel firing pin. Specs Brand: TacFire Manufacturer Part Number: BCG-NIB UPC: 686294505355 Product Type: Bolt Carrier Group Platform Compatibility: AR-15 / M16 Caliber Compatibility: .223 Remington, 5.56 NATO, .300 Blackout Carrier Style: M16 style Finish: Nickel Boron Carrier Material: 8620 Tool Steel Bolt Material: 9310 Tool Steel Gas Key Material: 17-4 Stainless Steel Extractor Material: S-7 Tool Steel Extractor Spring Material: Stainless Steel Music Wire Firing Pin Material: 17-4 Stainless Steel Inspection: Magnetic Particle Inspected (MPI) bolt Heat Treatment: Mil-Spec / military specification heat treated components Length: 7.5 in Weight: 11.6 oz Country of Manufacture: United States 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.