Product Description The LANTAC USA M-SPEC Bolt Carrier Group for .308/7.62 delivers a quality milspec-plus solution for AR-platform rifles chambered in .308 Winchester and 7.62 NATO. Designed for shooters who need a dependable, precisely manufactured bolt carrier group without the premium price of a fully enhanced component, the M-SPEC line adheres to military specification dimensions, tolerances, and materials while incorporating targeted upgrades that elevate performance above standard milspec. The carrier is machined from 8620 steel, heat treated, hard turned, and ground to exacting tolerances, while the bolt is manufactured from MPI-tested Carpenter 158 or 9310 steel, shot peened for fatigue resistance, and hard turned and ground for a consistent, smooth fit. A durable nitride (black) finish provides corrosion resistance and long-term durability. Backed by a Lifetime Warranty and proudly made in the USA, this BCG is an outstanding choice for builders and owners seeking proven performance at a sensible price point. Product Highlights 8620 Steel Carrier - Heat treated, hard turned, and ground for precise fit and lasting durability in .308/7.62 AR platforms MPI-Tested Bolt - Carpenter 158 or 9310 steel bolt, shot peened and hard turned/ground for superior fatigue resistance and reliable cycling Nitride Black Finish - Corrosion-resistant nitride treatment provides a sleek black appearance and extended service life Milspec-Plus Engineering - Meets military specification dimensions and tolerances with added enhancements that exceed standard milspec performance Lifetime Warranty and USA Made - Manufactured in the United States and backed by a full lifetime warranty for lasting peace of mind Specs Brand: LANTAC USA Model: M-SPEC Manufacturer Part Number (MPN): 01-MSPEC-762-NIT-BCG UPC: 711841794101 Product Type: Bolt Carrier Group (BCG) Caliber Compatibility: .308 Winchester / 7.62 NATO Carrier Material: 8620 Steel, Heat Treated, Hard Turned and Ground Bolt Material: MPI Carpenter 158 or 9310 Steel, Shot Peened, Hard Turned/Ground Finish: Nitride (Black) Length: 11.05 in. Warranty: Lifetime Country of Origin: USA 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. ]]>