The Faxon Sentry AR-15 Complete Lower Receiver provides a quality starting point for AR-15 rifle builds, engineered from proven materials for long-term reliability. Crafted from 7075-T6 forged aluminum, it includes a B5 adjustable stock for ergonomic adaptability and offers compatibility with a variety of calibers. This complete assembly is intended to deliver versatility and performance for both new builds and upgrades. 7075-T6 forged aluminum construction for durability and strength Complete assembly with B5 adjustable stock and grip included Compatible with multi-caliber AR-15 rifle builds With its robust build and premium factory components, this Faxon lower receiver is designed for those seeking a dependable and adaptable AR-15 platform. It is well suited for a range of shooting applications and preferences.