Aero Precision is producing this no nonsense durable AR308 Stripped Lower Receiver. This M5 receiver is crafted from precision machined 7075-T6 aluminum with a flat dark earth Cerakote finish. The lower works with standard DPMS 308 components and LR-308/SR-25 magazines. The lower is Cal Multi marked and the selector markings will work with 45, 60 or 90 degree throw safety selectors. The rear takedown pin hole is threaded for a 4-40 set screw and it includes a nylon tipped upper tension screw. This receiver can be used with any standard AR-308 caliber build including, .243 Winchester, 6.5 Creedmoor, and .308 Winchester or 7.62x51mm NATO. If you're looking for an affordable solid AR lower receiver to start your next build then you're looking for the Aero Precision M5 Stripped Lower Receiver!