Product DescriptionThe Phase 5 Weapon Systems BCGM16 complete bolt carrier group is a Mil-Spec M16/M4-style BCG built for dependable function and long service life. It features a heat-treated construction with a chrome-lined inner surface to support smooth cycling and durability, finished in a corrosion-resistant black phosphate coating. This is a complete assembly and includes the key components needed for installation in compatible M16/M4 platforms.Product Highlights Mil-Spec M16/M4 bolt carrier group for compatible M4/M16 platforms Heat-treated construction with a chrome-lined inner surface for durability Black phosphate finish for corrosion resistance and reduced glare Complete BCG includes bolt, gas key, firing pin, and cam pin Designed as a drop-in replacement/upgrade for standard AR-pattern BCG assembliesSpecs Brand: PHASE 5 WEAPON SYSTEMS Model/Series: Complete Bolt Carrier Group Type: Bolt Carrier Group (BCG) Firearm Fit: M4 / M16 Finish: Black Phosphate Material: Stainless Steel Inner: Chrome-lined Includes: Bolt, gas key, firing pin, cam pin Overall Length: 7.50 in (approx.) Weight: 0.8 lb (approx.) UPC: 813318020123 Manufacturer Part Number: BCGM16Disclaimer: 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 products manufacturer.