Upgrade your firearm with the Black Rain Ordnance .223 Nickel Boron Bolt Carrier Group, designed for superior performance and durability. This high-quality bolt carrier group features a nickel boron (NiB) coating that ensures smooth operation and easy cleaning. Engineered for .223 and 5.56 calibers, the BRO-BCG is a must-have for any serious shooter. Enhance your shooting experience with this reliable and efficient bolt carrier group.