Product DescriptionThe ANDRO CORP INDUSTRIES AR-15 / M16 Nitride Bolt Carrier Group is a full auto rated bolt carrier group built for dependable performance in compatible AR-platform rifles. Finished in black nitride, this BCG is designed to offer durability, smooth operation, and easier maintenance. The carrier is machined from 8620 alloy steel and features a full auto profile, while the bolt is precision machined from 9310 alloy steel for strength and reliability. Additional quality-focused features include Magnetic Particle Inspection (MPI), a carburized and case hardened bolt, shot peening, parkerizing, and a properly staked gas key.Product Highlights Full auto rated AR-15 / M16 bolt carrier group for reliable cycling and consistent performance 8620 alloy steel carrier with black nitride finish for durability and corrosion resistance 9310 alloy steel bolt that is precision machined, carburized, case hardened, shot peened, and parkerized Magnetic Particle Inspected (MPI) to help verify structural integrity and quality Properly staked gas key helps maintain secure function under repeated use Specs Product Type: Bolt Carrier Group Platform Compatibility: AR-15 / M16 Finish: Black Nitride Profile: Full Auto Carrier Material: 8620 Alloy Steel Bolt Material: 9310 Alloy Steel Inspection: Magnetic Particle Inspected (MPI) Gas Key: Properly Staked Bolt Treatment: Carburized / Case Hardened, Shot Peened, Parkerized Manufacturer Part Number: AR15BCGN UPC: 736684139780 Brand: ANDRO CORP INDUSTRIES 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.