Product Description The WMD Guns NiB-X Bolt Carrier Group (BCG) with hammer for 5.56 platforms is built for reliability and simplified maintenance in demanding AR-15 setups. Its bolt carrier group components are NiB-X coated and polished to help reduce fouling adherence, making cleanup faster and helping the action run smoother. The NiB-X coating is backed by a lifetime guarantee against chipping, spalling, or flaking, and has been endurance tested past 30,000 rounds without wearing off. This easy-clean design is especially beneficial for short-barreled rifles and suppressed configurations where heat and carbon buildup are common. Product Highlights NiB-X coated and polished BCG components to reduce fouling adherence for easier cleaning Lifetime-guaranteed coating against chipping, spalling, or flaking Heat-treated construction for durability in high-round-count use Designed for AR-15 fitment; ideal for short-barrel and suppressed platforms Includes a matching hammer for a ready-to-install upgrade Specs Brand: WMD Guns Product Type: AR-15 Bolt Carrier Group (BCG) with Hammer Platform Fit: AR-15 Caliber/Compatibility: 5.56 Finish/Coating: NiB-X (Nickel Boron) Material (carrier): 8620 steel Weight: 0.94 lb Manufacturer Part Number: NIBXBCG-0002 UPC: 855899003003 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.