The Black Rain Ordnance Bolt Carrier Group, chambered for .223 Remington/5.56 NATO, offers exceptional performance with a unique Biohazard engraving. Featuring a durable Nickel Boron finish, this bolt carrier group provides enhanced wear resistance, smoother cycling and easier cleaning. Built for reliability and precision, it's a standout addition to any AR-15 platform, combining both functionality and eye-catching design.