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

The Brownells AR-15 bolt carrier group is an essential component for any AR-15 enthusiast, whether you're completing a new build or preparing for future maintenance. Designed for reliability and versatility, this BCG is compatible with AR-15 rifles chambered in 5.56x45mm, .223 Remington and 300 Blackout. The bolt is crafted from durable 9310 tool steel, which undergoes heat treatment and shot peening for enhanced strength and longevity. The carrier is precision machined from 8620 hardened steel, ensuring robust performance. Both the bolt and carrier, along with all other components, are finished with a nitride coating for superior corrosion resistance and smooth operation. Each bolt is rigorously tested with magnetic particle inspection to ensure quality and reliability. The gas key is securely torqued and staked, providing a dependable seal and function. The complete package includes the bolt, bolt carrier, gas key, firing pin, cam pin, firing pin retaining pin and an extractor with the necessary spring and rubber insert. This bolt carrier group is designed to work seamlessly with any cartridge based on the 5.56x45mm case, though it is not intended for use in full-auto lower receivers. With the Brownells AR-15 bolt carrier group, you can trust in consistent performance and peace of mind, knowing you're equipped with a high-quality, ready-to-use component.Material - 8620 hardened steel carrier9310 tool steel, heat-treated and shot peened bolt materialNitride coatingBolt inspected using magnetic particle testingTorque and secured gas key5.56x45mm caliber