Product DescriptionThe Noveske 6mm ARC Bolt Carrier Group is built for shooters who want a premium AR-15 upgrade with enhanced durability, smooth function, and dependable performance. This bolt carrier group features a DLC exterior coating made to Noveske specifications for outstanding surface hardness, lubricity, and easier maintenance. The carrier is machined to USGI specifications from domestically sourced, aircraft-grade proprietary 8620 steel and includes a chrome-lined bore for long-term wear resistance. Designed with a proper Mil-Spec gas key that is chrome lined and heat treated to GI specifications, this M16/M4-pattern carrier group is engineered for reliable cycling. Improved geometry helps promote smoother locking and unlocking, and the bolt is compatible with both 6mm ARC and .22 ARC applications.Product Highlights DLC-coated exterior helps reduce friction, increase wear resistance, and simplify cleaning for demanding AR-15 use. Machined to USGI specifications with an M16/M4 carrier profile for dependable fit and function. Chrome-lined bore and chrome-lined Mil-Spec gas key support durability and consistent performance. Improved geometry is designed to provide smoother locking and unlocking with reduced wear over time. Built for 6mm ARC platforms and compatible with .22 ARC bolt applications for added versatility. Specs Product Type: Bolt Carrier Group Platform: AR-15 Carrier Pattern: M16/M4 Caliber Compatibility: 6mm ARC Additional Cartridge Compatibility: .22 ARC bolt compatible Exterior Finish: DLC coated Carrier Material: Proprietary aircraft-grade 8620 steel Construction Feature: SAE 9310 steel construction referenced by manufacturer data Bore: Chrome lined Gas Key: Mil-Spec, chrome lined, heat treated per GI specifications Design Benefit: Improved geometry for smoother locking and unlocking Color: Black MPN: 05002875 UPC: 840906139479 Brand Name: Noveske 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.