Brownells Bolt Assembly .223 Remington/5.56x45mm/.300 AAC Blackout, Black

The Brownells M16 5.56x45mm complete 9310 bolt assembly is engineered for durability and reliability, making it an ideal choice for both semi-automatic AR-15s and fully automatic M16 rifles. Crafted from robust 9310 steel, this bolt assembly is designed to endure the rigors of demanding operational environments, ensuring consistent and high-quality performance. Each component, including the bolt, gas rings, extractor and ejector, is meticulously installed and tested to meet stringent standards. Whether you're in the field or at the range, the Brownells M16 5.56x45mm bolt assembly delivers the resilience and precision you need for optimal firearm functionality.Material quality is verified using magnetic particle inspectionThe extractor is equipped with a spring and a rubber insertDesigned for compatibility with all 5.56x45mmbased casings